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(4/5)*(10*x-50) = (5/8)*(16*x-24) // - (5/8)*(16*x-24)
(4/5)*(10*x-50)-((5/8)*(16*x-24)) = 0
(4/5)*(10*x-50)+(-5/8)*(16*x-24) = 0
4/5*(10*x-50)-5/8*(16*x-24) = 0
4/5*(10*x-50)-5/8*(16*x-24) = 0
-2*x-25 = 0
-2*x-25 = 0
-2*x-25 = 0 // + 25
-2*x = 25 // : -2
x = 25/(-2)
x = -25/2
x = -25/2
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