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a in (-oo:+oo)
11 = 3*a-2*a+3 // - 3*a-2*a+3
11-(-2*a)-(3*a)-3 = 0
2*a-3*a-3+11 = 0
8-a = 0 // - 8
-a = -8 // * -1
a = 8
a = 8
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