#### Review Exercises (Chapter 3—Answers)

1. x + 5 = 13 → x = 8

2. z − 6 = 3 → z = 9

3. $\begin{array}{c}3y+1-5y-7=7y+8+y-12\to -2y-6=8y-4\\ 10y=-2\to y=\frac{-1}{5}\end{array}$

4. $-5z=11\to z=\frac{-11}{5}$

5. $4\frac{y}{2}=3\to y=\frac{3}{2}$

6. $\frac{z}{-3}=-11\to z=33$

7. $7z-3=2\to z=\frac{5}{7}$

8. $5-\frac{t}{3}=9\to t=-12$

9. $\begin{array}{c}\frac{4t}{7}-1=\frac{8t}{3}+5\to 21\left(\frac{4t}{7}\right)=21\left(\frac{8t}{3}+6\right)\\ 12t=56t+126\to 44t=-126\to t=\end{array}$

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