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a in (-oo:+oo)
3*a-5 = 6*a-29 // - 6*a-29
3*a-(6*a)-5+29 = 0
3*a-6*a-5+29 = 0
24-3*a = 0 // - 24
-3*a = -24 // : -3
a = -24/(-3)
a = 8
a = 8
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