Solve for b
b = \frac{45}{7} = 6\frac{3}{7} \approx 6.428571429
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7b-9=36
Combine b and 6b to get 7b.
7b=36+9
Add 9 to both sides.
7b=45
Add 36 and 9 to get 45.
b=\frac{45}{7}
Divide both sides by 7.
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