Lesson 19

Solve.

1. $\frac25t=6$

2. $\text-4.5 = a-8$

3. $\frac12+p= \text-3$

4. $12=x \boldcdot 3$

5. $\text-12 = \text-3y$

Match each equation to a step that will help solve the equation.

1. Write an equation where a number is added to a variable, and a solution is -8.
2. Write an equation where a number is multiplied by a variable, and a solution is $\frac {\text{-}4}{5}$.

Evaluate each expression if $x$ is $\frac{2}{5}$, $y$ is $\text-4$, and $z$ is -0.2.

1. $x+y$

2. $2x-z$

3. $x+y+z$

4. $y \boldcdot x$

The markings on the number line are evenly spaced. Label the other markings on the number line.

One night, it is $24^\circ\text{C}$ warmer in Tucson than it was in Minneapolis. If the temperatures in Tucson and Minneapolis are opposites, what is the temperature in Tucson?

$\text-24^\circ\text{C}$

$\text-12^\circ\text{C}$

$12^\circ\text{C}$

$24^\circ\text{C}$