Question

1. $12 - 3b < 9$

Explanation:

Step1: Subtract 12 from both sides

$12 - 3b - 12 < 9 - 12$
$-3b < -3$

Step2: Divide by -3, reverse inequality

$\frac{-3b}{-3} > \frac{-3}{-3}$

Answer:

$b > 1$