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x in (-oo:+oo)
(3/4)*x-((1/3)*x) = 10 // - 10
(3/4)*x-((1/3)*x)-10 = 0
(3/4)*x+(-1/3)*x-10 = 0
5/12*x-10 = 0 // + 10
5/12*x = 10 // : 5/12
x = 10/5/12
x = 24
x = 24
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