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(2/3)*x-10 = -((1/4)*x)-71/6 // + -((1/4)*x)-71/6
(2/3)*x+(1/4)*x-(-71/6)-10 = 0
(2/3)*x+(1/4)*x+71/6-10 = 0
11/12*x+11/6 = 0 // - 11/6
11/12*x = -11/6 // : 11/12
x = -11/6/11/12
x = -2
x = -2
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