Answer:
80.) h = 18; 82.) b = 4; 85.) 50 = m; 86.) f = 94.13; 87.) n = 66; 88.) h = 16
Explanation:
The theme of these problems is using the inverse calculation to find what number the variable represents.
For example, on problem 80., we have h/9 = 3
The inverse of division is multiplication so we multiply both sides by 9:
9*(h/9) = (3)*9
h = 18
82.) 48 = 12b (divide both sides by 12)
4 = b
85.) 10 = m/5 (multiply both sides by 5)
50 = m
86.) 86.5 = f - 7.63 (add 7.63 to both sides)
94.13 = f
87.) n/6 = 11 (multiply both sides by 6)
n = 66
88.) 3/4h = 12 (divide both sides by 3/4)
When dividing by fractions, we multiply by the reciprocal of the fraction so we have:
12 ÷ 3/4 = 12 * 4/3 = 48/3 = 16