SOLUTION: 3x + 2y =12 2x + y = 7

Question 196176: 3x + 2y =12
2x + y = 7
Answer by RAY100(1637) (Show Source): You can put this solution on YOUR website!
(1) 3x +2 y =12
(2) 2x +y =7, or y = (7-2x)
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substitute into (1)
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3x +2(7-2x) =12
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3x +14 -4x =12
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-x = -2
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x =2,,,,,ANSWER
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substitute in (2)
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y= 7 -2(2) = 3 =y,,,,,,ANSWER
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Checking
(1) 3(2) +2(3) =12,,,,,,6+6=12,,,,,12=12,,,ok
(2) 2(2) +(3) = 7,,,,4+3=7,,,7=7,,,,,ok
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