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x in (-oo:+oo)
(3*x+1)/3+(x+7)/2 = 4*x+1 // - 4*x+1
(3*x+1)/3+(x+7)/2-(4*x)-1 = 0
(3*x+1)/3+(x+7)/2-4*x-1 = 0
(2*(3*x+1))/(2*3)+(3*(x+7))/(2*3)+(-4*2*3*x)/(2*3)+(-1*2*3)/(2*3) = 0
2*(3*x+1)+3*(x+7)-4*2*3*x-1*2*3 = 0
9*x-24*x-6+23 = 0
23-15*x-6 = 0
17-15*x = 0
(17-15*x)/(2*3) = 0
(17-15*x)/(2*3) = 0 // * 2*3
17-15*x = 0
17-15*x = 0 // - 17
-15*x = -17 // : -15
x = -17/(-15)
x = 17/15
x = 17/15
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