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x in (-oo:+oo)
1-2*x-(3*x) = -34 // + 34
1-2*x-(3*x)+34 = 0
1-2*x-3*x+34 = 0
35-5*x = 0 // - 35
-5*x = -35 // : -5
x = -35/(-5)
x = 7
x = 7
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