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43 votes
43 votes
2x + 3y = 7
-2x + 5y = 9

User Stuart Allen
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1 Answer

16 votes
16 votes
2x+3y=7 + -2x+5y=9
= 0-2y=-2
= -2y=-2 (then divide both sides by -2)
= y=2

Substitute your y value into one of the equations:

2x+3y=7
2x+3(2)=7
2x+6=7 (then subtract 6 from both sides)
2x=1 (then divide both sides by 2)
x=1/2 or 0.5
User Dr Xorile
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