Solve for b
b=8
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\frac{30}{2}=7+b
Divide both sides by 2.
15=7+b
Divide 30 by 2 to get 15.
7+b=15
Swap sides so that all variable terms are on the left hand side.
b=15-7
Subtract 7 from both sides.
b=8
Subtract 7 from 15 to get 8.
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