Answer:
Variable: b
Equation: $12b + $16 = $112
Solution: 8 books
Explanation:
$12b + $16 = $112
$12b + $16 - $16 = $112 - $16
$12b = $96
$12b ÷ $12 = $96 ÷ $12
b = 8
Hope that helps.
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