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2*x+x/2-4 = 3/4 // - 3/4
2*x+x/2-(3/4)-4 = 0
2*x+x/2-3/4-4 = 0
5/2*x-19/4 = 0 // + 19/4
5/2*x = 19/4 // : 5/2
x = 19/4/5/2
x = 19/10
x = 19/10
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