Answer:
![r=-3](https://img.qammunity.org/2021/formulas/mathematics/high-school/1391ovwh6iyjdn0w658unxfzs7fb8l3dwe.png)
Explanation:
We have the equation:
![\displaystyle (1)/(3)r+1=-(2)/(3)r-2](https://img.qammunity.org/2021/formulas/mathematics/college/3y5tqn4bzog0t0hgourlphouphhxu26m54.png)
And we would like to solve for r.
First, we can multiply both sides by the denominator 3. This will remove the fractions. So:
![\displaystyle 3((1)/(3)r+1)=3(-(2)/(3)r-2)](https://img.qammunity.org/2021/formulas/mathematics/college/ztsc3hyfzg2lpsvc1nw27tv43kfqvqvyhd.png)
Distribute:
![\displaystyle r+3=-2r-6](https://img.qammunity.org/2021/formulas/mathematics/college/eic8j39nfcw68p7j1tnypqnxt83rbgg6uk.png)
Now, we can add 2r to both sides:
![3r+3=-6](https://img.qammunity.org/2021/formulas/mathematics/college/dhuuspqg4ipvgt8pjj3dqkhjls14s5o98e.png)
And we can also subtract 3 from both sides:
![3r=-9](https://img.qammunity.org/2021/formulas/mathematics/college/y3nikpfiwetiytz2r705lpchzx7sskic16.png)
Finally, we can divide both sides by 3 to get:
![r=-3](https://img.qammunity.org/2021/formulas/mathematics/high-school/1391ovwh6iyjdn0w658unxfzs7fb8l3dwe.png)