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4*(x+1)+2*x = x+2/3 // - x+2/3
4*(x+1)+2*x-x-(2/3) = 0
4*(x+1)+2*x-x-2/3 = 0
(3*4*(x+1))/3+(2*3*x)/3+(3*(-x))/3-2/3 = 0
3*4*(x+1)+2*3*x+3*(-x)-2 = 0
18*x-3*x-2+12 = 0
15*x-2+12 = 0
15*x+10 = 0
(15*x+10)/3 = 0
(15*x+10)/3 = 0 // * 3
15*x+10 = 0
15*x+10 = 0 // - 10
15*x = -10 // : 15
x = -10/15
x = -2/3
x = -2/3
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