Sumário

Practice Test

325.

Determine whether each number is a solution to the equation.
$3 x + 5 = 23 . 3 x + 5 = 23 .$

In the following exercises, solve each equation.

326.

$n - 18 = 31 n - 18 = 31$

327.

$9 c = 144 9 c = 144$

328.

$4 y - 8 = 16 4 y - 8 = 16$

329.

$−8 x - 15 + 9 x - 1 = −21 −8 x - 15 + 9 x - 1 = −21$

330.

$−15 a = 120 −15 a = 120$

331.

$\frac{2}{3} x = 6 \frac{2}{3}$

332.

$x + 3.8 = 8.2 x + 3.8 = 8.2$

333.

$10 y = −5 y + 60 10 y = −5 y + 60$

334.

$8 n + 2 = 6 n + 12 8 n + 2 = 6 n + 12$

335.

$9 m - 2 - 4 m + m = 42 - 8 9 m - 2 - 4 m + m = 42 - 8$

336.

$−5 (2 x + 1) = 45 −5 (2 x + 1) = 45$

337.

$- (d + 9) = 23 - (d + 9) = 23$

338.

$\frac{1}{3} (6 m + 21) = m - 7 \frac{1}{3} (6 m + 21) = m - 7$

339.

$2 (6 x + 5) - 8 = −22 2 (6 x + 5) - 8 = −22$

340.

$8 (3 a + 5) - 7 (4 a - 3) = 20 - 3 a 8 (3 a + 5) - 7 (4 a - 3) = 20 - 3 a$

341.

$\frac{1}{4} p + \frac{1}{3} = \frac{1}{2} \frac{1}{4}$

342.

$0.1 d + 0.25 (d + 8) = 4.1 0.1 d + 0.25 (d + 8) = 4.1$

343.

Translate and solve: The difference of twice $x x$ and $44$ is $16 . 16 .$

344.

Samuel paid $$25.82 $25.82$ for gas this week, which was $$3.47 $3.47$ less than he paid last week. How much did he pay last week?