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2(q-15)=-12
We move all terms to the left:
2(q-15)-(-12)=0
We add all the numbers together, and all the variables
2(q-15)+12=0
We multiply parentheses
2q-30+12=0
We add all the numbers together, and all the variables
2q-18=0
We move all terms containing q to the left, all other terms to the right
2q=18
q=18/2
q=9
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