divide by 2 to give 3.5x = y
That is all you can do without further information about x.
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2y + 7x + y-1?
This equation is unsolvable without knowing one of the values of either x or y.
For y - 2y - 3y equals 0, y equals 0.
Double first equation: 10x + 2y = 10Subtract second equation: 7x = 7x = 1, y = 0
are those two different problems ? ... i am going to solve them as if they are 14x-2y=78 (re arange the terms to be easily solved) -2y=78-14x (times by -1) 2y= -78+14x (divide all terms by 2) y=-39+7x (so) y=7x-39 2x-2y=6 (re arange the terms to be easily solved) -2y=6-2x (times by -1) 2y=2x-6 (divide all terms by 2) y=x-6