Solve for r 8=3r-1

$8 = 3 r - 1$

Step 1

Rewrite the equation as $3 r - 1 = 8$ .

$3 r - 1 = 8$

Step 2

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

Add $1$ to both sides of the equation.

$3 r = 8 + 1$

Add $8$ and $1$ .

$3 r = 9$

Step 3

Divide each term in $3 r = 9$ by $3$ and simplify.

Divide each term in $3 r = 9$ by $3$ .

$\frac{3 r}{3} = \frac{9}{3}$

Simplify the left side.

Cancel the common factor of $3$ .

Cancel the common factor.

$\frac{3 r}{3} = \frac{9}{3}$

Divide $r$ by $1$ .

$r = \frac{9}{3}$

Simplify the right side.

Divide $9$ by $3$ .

$r = 3$