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x in (-oo:+oo)
4*x-(7*x)-8 = 10 // - 10
4*x-(7*x)-10-8 = 0
4*x-7*x-10-8 = 0
-3*x-18 = 0 // + 18
-3*x = 18 // : -3
x = 18/(-3)
x = -6
x = -6
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