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Solve the second equation for either X or Y and substitute that expression into the first equation. Then determine both X and Y.
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x = (12+2y)/3
Now put this value in
2x -y =1 not sure if that is + or -
2(12+2y)/3-y = 1
and then calculate x
let me know if you got problems
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Copyright © 2017 HubPages Inc. and respective owners.