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x in (-oo:+oo)
2*(x+1)+2*x+(1/2)*x = 29 // - 29
2*(x+1)+2*x+(1/2)*x-29 = 0
2*(x+1)+2*x+x/2-29 = 0
(2^2*(x+1))/2+(2*2*x)/2+x/2+(-29*2)/2 = 0
2^2*(x+1)+2*2*x+x-29*2 = 0
8*x+x-58+4 = 0
9*x-58+4 = 0
9*x-54 = 0
(9*x-54)/2 = 0
(9*x-54)/2 = 0 // * 2
9*x-54 = 0
9*x-54 = 0 // + 54
9*x = 54 // : 9
x = 54/9
x = 6
x = 6
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