Question

solve: -15 < 3x + 6 < 27. express your answer using interval notation. if needed, enter the infinity symbol, ∞, by using two consecutive lowercase os with no spaces between them: oo. question 38 score: 87/100 answered: 36/42 practice test 1 (chap 1 - 2) due thursday by 9pm points 100 submitting an external tool progress saved done

Explanation:

Step1: Subtract 6 from all parts

$-15 - 6<3x+6 - 6<27 - 6$ which simplifies to $-21 < 3x<21$.

Step2: Divide all parts by 3

$\frac{-21}{3}<\frac{3x}{3}<\frac{21}{3}$, so $-7 < x<7$.

Answer:

(-7,7)