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(4/5)*(3*x-(1/3)) = 8/15 // - 8/15
(4/5)*(3*x-(1/3))-(8/15) = 0
(4/5)*(3*x-1/3)-8/15 = 0
4/5*(3*x-1/3)-8/15 = 0
(4/5*15*(3*x-1/3))/15-8/15 = 0
4/5*15*(3*x-1/3)-8 = 0
36*x-12 = 0
(36*x-12)/15 = 0
(36*x-12)/15 = 0 // * 15
36*x-12 = 0
36*x-12 = 0 // + 12
36*x = 12 // : 36
x = 12/36
x = 1/3
x = 1/3
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