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x in (-oo:+oo)
(1/6)*x+(1/8)*x = 35 // - 35
(1/6)*x+(1/8)*x-35 = 0
7/24*x-35 = 0 // + 35
7/24*x = 35 // : 7/24
x = 35/7/24
x = 120
x = 120
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