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(3/4)*(5*x-4) = 13 // - 13
(3/4)*(5*x-4)-13 = 0
3/4*(5*x-4)-13 = 0
3/4*(5*x-4)-13 = 0
15/4*x-16 = 0
15/4*x-16 = 0
15/4*x-16 = 0 // + 16
15/4*x = 16 // : 15/4
x = 16/15/4
x = 64/15
x = 64/15
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