Question 211411: Find the values of x and y that solve the system equation
-4x + 5y = -10
5x - 4y = 8
Answer by RAY100(1637)   (Show Source):
You can put this solution on YOUR website! Multiply 1st eqn by 4 and 2nd eqn by 5
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-16x+20y=-40
25x-20y = 40,,,,,add
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9x =0
x=0,,,,,,,subst in 1st eqn
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-16(0) +20y = -40
y=-2
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check,,,(1) -4(0)+5(-2)=-10,,,,,ok
(2) 5(0) -4(-2)=8,,,,,,,,ok
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