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2*x-5 = -7/2 // + -7/2
2*x-(-7/2)-5 = 0
2*x+7/2-5 = 0
2*x-3/2 = 0 // + 3/2
2*x = 3/2 // : 2
x = 3/2/2
x = 3/4
x = 3/4
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