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(1/6)*(8*x-7) = x+7/12 // - x+7/12
(1/6)*(8*x-7)-x-(7/12) = 0
(1/6)*(8*x-7)-x-7/12 = 0
1/6*(8*x-7)-x-7/12 = 0
(1/6*12*(8*x-7))/12+(12*(-x))/12-7/12 = 0
1/6*12*(8*x-7)+12*(-x)-7 = 0
4*x-14-7 = 0
4*x-21 = 0
(4*x-21)/12 = 0
(4*x-21)/12 = 0 // * 12
4*x-21 = 0
4*x-21 = 0 // + 21
4*x = 21 // : 4
x = 21/4
x = 21/4
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