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(3/4)*((2/7)*x-(3/4)) = -125/336 // + -125/336
(3/4)*((2/7)*x-(3/4))-(-125/336) = 0
(3/4)*((2/7)*x-3/4)+125/336 = 0
3/4*(2/7*x-3/4)+125/336 = 0
(3/4*336*(2/7*x-3/4))/336+125/336 = 0
3/4*336*(2/7*x-3/4)+125 = 0
72*x-64 = 0
(72*x-64)/336 = 0
(72*x-64)/336 = 0 // * 336
72*x-64 = 0
72*x-64 = 0 // + 64
72*x = 64 // : 72
x = 64/72
x = 8/9
x = 8/9
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