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3*x-(5/2) = -7 // + 7
3*x-(5/2)+7 = 0
3*x-5/2+7 = 0
3*x+9/2 = 0 // - 9/2
3*x = -9/2 // : 3
x = -9/2/3
x = -3/2
x = -3/2
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