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q in (-oo:+oo)
-(3-q) = (1/2)*(6*q-26) // - (1/2)*(6*q-26)
q-((1/2)*(6*q-26))-3 = 0
(-1/2)*(6*q-26)+q-3 = 0
q-1/2*(6*q-26)-3 = 0
q-1/2*(6*q-26)-3 = 0
13-2*q-3 = 0
10-2*q = 0
10-2*q = 0
10-2*q = 0 // - 10
-2*q = -10 // : -2
q = -10/(-2)
q = 5
q = 5
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