Question

1. \frac{r - 8.7}{3.6} = 3.722

Explanation:

Step1: Identify the equation

The equation is $\frac{r - 8.7}{3.6}=3.722$ (assuming the number on the right is 3.722 from the image).

Step2: Multiply both sides by 3.6

To isolate the numerator, multiply both sides of the equation by 3.6.
$$\frac{r - 8.7}{3.6}\times3.6 = 3.722\times3.6$$
Simplifying the left side gives $r - 8.7$, and calculating the right side: $3.722\times3.6 = 13.3992$

Step3: Add 8.7 to both sides

To solve for $r$, add 8.7 to both sides of the equation $r - 8.7 = 13.3992$.
$$r - 8.7 + 8.7=13.3992 + 8.7$$
Simplifying both sides gives $r = 22.0992$

Answer:

$r = 22.0992$