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(1/5)*x-((1/8)*x)-(1/6)+5/24 = (-7/30)*x+(1/4)*x-(7/40) // - (-7/30)*x+(1/4)*x-(7/40)
(1/5)*x-((1/8)*x)-((-7/30)*x)-((1/4)*x)-(1/6)+5/24+7/40 = 0
(1/5)*x+(-1/8)*x+(7/30)*x+(-1/4)*x-1/6+5/24+7/40 = 0
7/120*x+13/60 = 0 // - 13/60
7/120*x = -13/60 // : 7/120
x = -13/60/7/120
x = -26/7
x = -26/7
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