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5*x+1/2 = 2*x+3 // - 2*x+3
5*x-(2*x)+1/2-3 = 0
5*x-2*x+1/2-3 = 0
3*x-5/2 = 0 // + 5/2
3*x = 5/2 // : 3
x = 5/2/3
x = 5/6
x = 5/6
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