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(3/4)*x+12 = -((2/3)*x)-5 // + -((2/3)*x)-5
(3/4)*x+(2/3)*x+5+12 = 0
17/12*x+17 = 0 // - 17
17/12*x = -17 // : 17/12
x = -17/17/12
x = -12
x = -12
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