Solve for r -4=r/20-5

$- 4 = \frac{r}{20} - 5$

Step 1

Rewrite the equation as $\frac{r}{20} - 5 = - 4$ .

$\frac{r}{20} - 5 = - 4$

Step 2

Move all terms not containing $r$ to the right side of the equation.

Add $5$ to both sides of the equation.

$\frac{r}{20} = - 4 + 5$

Add $- 4$ and $5$ .

$\frac{r}{20} = 1$

Step 3

Multiply both sides of the equation by $20$ .

$20 \frac{r}{20} = 20 \cdot 1$

Step 4

Simplify both sides of the equation.

Simplify the left side.

Cancel the common factor of $20$ .

Cancel the common factor.

$20 \frac{r}{20} = 20 \cdot 1$

Rewrite the expression.

$r = 20 \cdot 1$

Simplify the right side.

Multiply $20$ by $1$ .

$r = 20$