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x in (-oo:+oo)
3*(x-7) = 4*x-(1/3) // - 4*x-(1/3)
3*(x-7)-(4*x)+1/3 = 0
3*(x-7)-4*x+1/3 = 0
(3^2*(x-7))/3+(-4*3*x)/3+1/3 = 0
3^2*(x-7)-4*3*x+1 = 0
1-3*x-63 = 0
-3*x-62 = 0
(-3*x-62)/3 = 0
(-3*x-62)/3 = 0 // * 3
-3*x-62 = 0
-3*x-62 = 0 // + 62
-3*x = 62 // : -3
x = 62/(-3)
x = -62/3
x = -62/3
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