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2*x+3*x+5*x-(3/6)-(2/4)+6/12 = 4 // - 4
2*x+3*x+5*x-(3/6)-(2/4)+6/12-4 = 0
2*x+3*x+5*x-1/2-1/2+6/12-4 = 0
10*x-9/2 = 0 // + 9/2
10*x = 9/2 // : 10
x = 9/2/10
x = 9/20
x = 9/20
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