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(3/4)*x-12 = 1/2-6 // - 1/2-6
(3/4)*x-(1/2)-12+6 = 0
(3/4)*x-1/2-12+6 = 0
3/4*x-13/2 = 0 // + 13/2
3/4*x = 13/2 // : 3/4
x = 13/2/3/4
x = 26/3
x = 26/3
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