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x in (-oo:+oo)
(1/2)*x-((1/3)*(x-5)) = 3*x // - 3*x
(1/2)*x-((1/3)*(x-5))-(3*x) = 0
(-1/3)*(x-5)+(1/2)*x-3*x = 0
x/2-1/3*(x-5)-3*x = 0
(-1/3*2*(x-5))/2+x/2+(-3*2*x)/2 = 0
x-1/3*2*(x-5)-3*2*x = 0
1/3*x-6*x+10/3 = 0
10/3-17/3*x = 0
(10/3-17/3*x)/2 = 0
(10/3-17/3*x)/2 = 0 // * 2
10/3-17/3*x = 0
10/3-17/3*x = 0 // - 10/3
-17/3*x = -10/3 // : -17/3
x = -10/3/(-17/3)
x = 10/17
x = 10/17
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