Question

solve for a.
1 + 4a ≥ 9

Explanation:

Step1: Subtract 1 from both sides

$1 + 4a - 1 \geq 9 - 1$
$4a \geq 8$

Step2: Divide both sides by 4

$\frac{4a}{4} \geq \frac{8}{4}$
$a \geq 2$

Answer:

$a \geq 2$