Math -- Solving System of Equations With 2 Variables

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What does it mean?

We get from our teacher 2 equations with 2 variables and we need to solve them. If you are here reading me so far...is because you like the way Lord handles the problem right?

Forget if its useful or why they torture you with these stupid equations; let's go to grab this bull by the horns!

If you ever moved from house to house, when you were a kid younger than now. Have you ever noticed how Mom and Dad put stuff in Boxes so nothing will break or get lost easily? That's what Mnemonics does, it helps to put your brain focus on something otherwise scary or hard to learn.


EXAMPLE

VARIABLES X,Y

FIRST EQUATION

3X+2Y=19

SECOND EQUATION

2X+Y=12

YOUR TEACHER ASKS YOU TO SOLVE THE PROBLEM, WHICH MEANS YOU HAVE TO FIND THE VALUE OF X AND Y

SOLUTION

WE ISOLATE Y IN THE SECOND EQUATION

2X+Y=12

Y=12-2X

WE REPLACE THIS Y IN THE FIRST EQUATION

3X+2(12-2X)=19

WE SOLVE THIS EQUATION WITH VARIABLE X..

IF YOU ARE NOT READY, GO TO MR. BOUNCER TRICK TUTORIAL



3X+24-4X=19

3X-4X=19-24

-X=-5

X=5

IF we know that x=5 then we can replace the value of x in any of the stated equations

let's use this one

2X+Y=12

2(5)+Y=12

10+Y=12

Y=12-10

Y=2

Now you wonder why we normal people have to learn all these? Well, is part of the education systems and we have to graduate from High School. Math is useful for other applications that these geeks bragg about. But don't get me wrong, math is like any subject...you've gotta pass it! and graduate!! Now, unless..you want to make graphics or games or future wii or X-Box games...huh? or maybe design future cars, huh?

NEXT SECOND WAY OF SOLVING IT

IN ANOTHER HUB...TAKE A BREAK SAMMY!

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Comments 18 comments

AEvans profile image

AEvans 5 years ago from SomeWhere Out There

You have missed your calling, you should have been a teacher. Since you have explained it looks more simple. Great Hub! :)


Lord De Cross profile image

Lord De Cross 5 years ago Author

Wow! you are praising your friend too much.Lol! I should've, but I'm working on something I like,,so I'm fine.


cristina327 profile image

cristina327 5 years ago from Manila

Great hub. It is explained wery clear. You made it so easy to be done. Thank you for sharing it. Remain blessed always.


Lord De Cross profile image

Lord De Cross 5 years ago Author

Cristina, I'm honored to have your comment in here. I know you teach and are a Christian. So you deserve good blessings!


LegendaryN8 profile image

LegendaryN8 5 years ago from USA

The problem I always had with algebra was that I didn't understand why sometimes the letter changed. Sometimes the unknown variable was X,A,Q,Y, etc. Once someone explained to me that it was just a "container" for the number, it made a lot more sense, because I just put the number into the "container".


Lord De Cross profile image

Lord De Cross 5 years ago Author

Very good LegendaryN8,

The name Variable comes from its actual latin root variatus..."able to change" English borrowed it from Normandy after King William the Conqueror stormed England in 1066 at Hastings. It could've been worst in Babylonian times with the Cuneiform way of writing.

HAVE a nice one!

LORD


carriethomson profile image

carriethomson 5 years ago from United Kingdom

U seem to be quite a math pro!! thats 1 sub i never liked so much. this was a nice hub, very easily explained and for me easily understood :-).

carrie


whiteorchids profile image

whiteorchids 5 years ago from Tropical Paradise

I am in awe of this hub, its a great tool for children and adult of all ages.


Lord De Cross profile image

Lord De Cross 5 years ago Author

Hi carrie,

Oh GEEZ! I just did what my tutor told me...use this trick and that..and we can get away with it. Thanks for taking your time to check it out...I mena you didnt have to.

LORD


Lord De Cross profile image

Lord De Cross 5 years ago Author

whiteorchids,

My main goal is demistify math and if this help our country...why should I keep it to myself? Is worth the try right? Pass it on, your kids or friends will thank you!

LORD

thnx!


tsmog profile image

tsmog 5 years ago from Escondido, CA

thanks for the memory ride into the past. I use math and algebra everyday building excel formulas for data base mining. Basic stuff that helps come up with answers for the boss. Sometimes I don't remember and off to the net I go, but this lesson I will remember, thanks again , , ,


Husky1970 5 years ago

Nice explanation of the substitution method of solving a system of simultaneous equations. Looking forward to your next hub on the linear combination method. Seriously, your explanations is clear and easily understood, as evidenced by the other comments from hubbers who were not math geeks.


Lord De Cross profile image

Lord De Cross 5 years ago Author

TSMOG.I feel flattered and I feel like a..humbled human with a personal mission. Thanks for stopping by.

LORD


Lord De Cross profile image

Lord De Cross 5 years ago Author

husky 1970,

will follow up with the next method as u asked...just giving time our kids to swallow this method bit after bit.THNX

LORD


kesinee profile image

kesinee 5 years ago from Bangkok, Thailand

LOL!! OK I can refresh a mathematics class at high school for now. Nice hub!!


Lord De Cross profile image

Lord De Cross 5 years ago Author

Kesinee, pass it on! is the best thing you can do, to share it with a struggling young kid.


icciev profile image

icciev 5 years ago from Kuwait

what a simple way to find the answers, you are amazing my friend. thanks for sharing this, voted up


Lord De Cross profile image

Lord De Cross 5 years ago Author

You are welcome icciev, Just pass it on to some kids in your area. They will thank you for life

LORD

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