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12=2(q-4)
We move all terms to the left:
12-(2(q-4))=0
We calculate terms in parentheses: -(2(q-4)), so:We get rid of parentheses
2(q-4)
We multiply parentheses
2q-8
Back to the equation:
-(2q-8)
-2q+8+12=0
We add all the numbers together, and all the variables
-2q+20=0
We move all terms containing q to the left, all other terms to the right
-2q=-20
q=-20/-2
q=+10
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