SOLUTION: 7x+y=50
8x+9y=10
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Question 204137: 7x+y=50
8x+9y=10
Answer by RAY100(1637) (Show Source): You can put this solution on YOUR website!
(1) 7x +y =50,,,,,y=(50-7x)
(2) 8x +9y =10
.
subst (1) in (2)
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8x +9(50-7x) = 10
8x +450 -63x =10
-55x =-440
x=8
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Subst in (1),,,y=50-7(8),,,,,y= -6
.
check,,,(1) 7(8)+(-6) = 50,,,,ok
(2) 8(8) +9(-6) = 10,,,,,ok
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