Answer:
a. subtract the other summant from the sum, so:
![? + 59(5)/(8) = 82(2)/(3)\\~\\? = 82(2)/(3) - 59(5)/(8)](https://img.qammunity.org/2022/formulas/mathematics/high-school/7yjl7vbhwl7rde4dwjl3vsp4mxwi2sy7zj.png)
b. divide the product by the other factor, so:
![87 \cdot ? = 9.526\\~\\? = 9.526 / 87](https://img.qammunity.org/2022/formulas/mathematics/high-school/rktcp0e03wvcohl9jx3nat3j1p3v3smdnl.png)
Explanation:
We're using equation transformations.
In first case, we're actually subtracting
from both sides of the equation.
In second case, we're dividing both sides of the equation by
.