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4x-5y = -8
4x+40 = y => y = 4x+40
Substitute the value of y into the top equation:
4x-5(4x+40) = -8
4x-20x-200 = -8
4x-20x = 200-8
-16x = 192
Divide both sides by -16 to find the value of x:
x = -12
Substitute the value of x into the original equations to find the value of y:
Therefore: x = -12 and y = -8
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