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(-5/4)*(x-8)+(1/4)*x = -4 // + 4
(-5/4)*(x-8)+(1/4)*x+4 = 0
x/4-5/4*(x-8)+4 = 0
(-5/4*4*(x-8))/4+x/4+(4^2)/4 = 0
x-5/4*4*(x-8)+16 = 0
16-4*x+40 = 0
56-4*x = 0
(56-4*x)/4 = 0
(56-4*x)/4 = 0 // * 4
56-4*x = 0
56-4*x = 0 // - 56
-4*x = -56 // : -4
x = -56/(-4)
x = 14
x = 14
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