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x in (-oo:+oo)
3*x-(5*x)-7 = -29 // + 29
3*x-(5*x)-7+29 = 0
3*x-5*x-7+29 = 0
22-2*x = 0 // - 22
-2*x = -22 // : -2
x = -22/(-2)
x = 11
x = 11
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