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6*x-3*x+1/2 = 37/2 // - 37/2
6*x-3*x+1/2-(37/2) = 0
6*x-3*x+1/2-37/2 = 0
3*x-18 = 0 // + 18
3*x = 18 // : 3
x = 18/3
x = 6
x = 6
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