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6*x-4 = -17/2 // + -17/2
6*x-(-17/2)-4 = 0
6*x+17/2-4 = 0
6*x+9/2 = 0 // - 9/2
6*x = -9/2 // : 6
x = -9/2/6
x = -3/4
x = -3/4
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