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Verified Answer :

\(\frac{1}{4}\)b - 10 = 7
Take 10 to the other side.

\(\frac{1}{4}\)b = 17

Multiply by 4 to isolate b
\(\frac{1}{4}\)b × 4 = 17 × 4

4 and 4 cancels out
 
b = 68