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x in (-oo:+oo)
4*x-((2/(-4))*x) = 10 // - 10
4*x-((2/(-4))*x)-10 = 0
4*x+(1/2)*x-10 = 0
9/2*x-10 = 0 // + 10
9/2*x = 10 // : 9/2
x = 10/9/2
x = 20/9
x = 20/9
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