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5(2q-10)=30
We move all terms to the left:
5(2q-10)-(30)=0
We multiply parentheses
10q-50-30=0
We add all the numbers together, and all the variables
10q-80=0
We move all terms containing q to the left, all other terms to the right
10q=80
q=80/10
q=8
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