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