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((5*(2*x-8))/3)/(-8) = 2*x // - 2*x
((5*(2*x-8))/3)/(-8)-(2*x) = 0
((5*(2*x-8))/3)/(-8)-2*x = 0
(5*(2*x-8))/(-8*3)-2*x = 0
(5*(2*x-8))/(-8*3)+(-8*(-2)*3*x)/(-8*3) = 0
5*(2*x-8)-8*(-2)*3*x = 0
58*x-40 = 0
(58*x-40)/(-8*3) = 0
(58*x-40)/(-8*3) = 0 // * -8*3
58*x-40 = 0
58*x-40 = 0 // + 40
58*x = 40 // : 58
x = 40/58
x = 20/29
x = 20/29
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