Answer
$a \lt -1$
Work Step by Step
Use the distributive property to simplify the left side of the equation:
$20a + 12 \lt -8$
Subtract $12$ from each side of the inequality to isolate the constants on one side of the inequality:
$20a \lt -20$
Divide each side by $20$ to solve for $a$:
$a \lt -1$
