# How do you solve 2= \frac { b - 1} { 4}?

May 14, 2018

$b = 9$

#### Explanation:

Multiply both sides by $4$

$8 = b - 1$

Add $1$ to each end

$b = 9$

May 14, 2018

$b = 9$

#### Explanation:

$\text{multiply both sides by 4}$

$4 \times 2 = \cancel{4} \times \frac{b - 1}{\cancel{4}}$

$\Rightarrow b - 1 = 8$

$\text{add 1 to both sides}$

$b \cancel{- 1} \cancel{+ 1} = 8 + 1$

$\Rightarrow b = 9$

$\frac{9 - 1}{4} = \frac{8}{4} = 2 \leftarrow \text{check}$