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x in (-oo:+oo)
-2*x-(4*x)-4 = 26 // - 26
-2*x-(4*x)-26-4 = 0
-2*x-4*x-26-4 = 0
-6*x-30 = 0 // + 30
-6*x = 30 // : -6
x = 30/(-6)
x = -5
x = -5
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