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x in (-oo:+oo)
-1 = 2*x-(4*x)-3 // - 2*x-(4*x)-3
4*x-(2*x)-1+3 = 0
4*x-2*x-1+3 = 0
2*x+2 = 0 // - 2
2*x = -2 // : 2
x = -2/2
x = -1
x = -1
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