## Algebra 1

$x \geq 4$
You can not take the square root of a negative number. Thus, 3(x - 4) must be greater than or equal to 0. $3(x - 4) \geq 0$ We divide both sides by 3. Zero divided by anything is zero $x - 4 \geq 0$ We add 4 to both sides $x \geq 4$