Answer:
a. subtract the other summant from the sum, so:
[tex]? + 59\frac{5}{8} = 82\frac{2}{3}\\~\\? = 82\frac{2}{3} - 59\frac{5}{8}[/tex]
b. divide the product by the other factor, so:
[tex]87 \cdot ? = 9.526\\~\\? = 9.526 / 87[/tex]
Step-by-step explanation:
We're using equation transformations.
In first case, we're actually subtracting [tex]59\frac{5}{8}[/tex] from both sides of the equation.
In second case, we're dividing both sides of the equation by [tex]87[/tex].