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x in (-oo:+oo)
-3*x-3 = 2*x-43 // - 2*x-43
43-3*x-(2*x)-3 = 0
43-3*x-2*x-3 = 0
40-5*x = 0 // - 40
-5*x = -40 // : -5
x = -40/(-5)
x = 8
x = 8
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