#### Answer

x = 4

#### Work Step by Step

5x - 1 = x + 15
First, you need to get the variable (x) on one side of the equation, so subtract x from both sides of the equation. This will remove the x from the right side of the equation.
5x - 1 - x = x + 15 - x
Simplify to get this:
4x - 1 = 15
Add 1 to each side.
4x - 1 + 1 = 15 + 1
Simplify to get:
4x = 16
Divide each side by 4.
$\frac{4x}{4}$ = $\frac{16}{4}$
Simplify to x = 16 $\div$ 4
x = 4