![\boxed{a=\frac{r+d}{c}}](https://tex.z-dn.net/?f=%5Cboxed%7Ba%3D%5Cfrac%7Br%2Bd%7D%7Bc%7D%7D)
<h2>
Explanation:</h2>
Here we have the following expression:
![ac=r+d](https://tex.z-dn.net/?f=ac%3Dr%2Bd)
And the question asks for solving the equation for the variable
. So we need to divide both sides of the equation by
:
![ac=r+d \\ \\ \frac{ac}{c}=\frac{r+d}{c} \\ \\ \\ But: \\ \\ \frac{c}{c}=1 \\ \\ \\ So: \\ \\ \boxed{a=\frac{r+d}{c}}](https://tex.z-dn.net/?f=ac%3Dr%2Bd%20%5C%5C%20%5C%5C%20%5Cfrac%7Bac%7D%7Bc%7D%3D%5Cfrac%7Br%2Bd%7D%7Bc%7D%20%5C%5C%20%5C%5C%20%5C%5C%20But%3A%20%5C%5C%20%5C%5C%20%5Cfrac%7Bc%7D%7Bc%7D%3D1%20%5C%5C%20%5C%5C%20%5C%5C%20So%3A%20%5C%5C%20%5C%5C%20%5Cboxed%7Ba%3D%5Cfrac%7Br%2Bd%7D%7Bc%7D%7D)
<h2>
Learn more:</h2>
Solving equations: brainly.com/question/10643312
#LearnWithBrainly
<span> A line that never changes, so you can choose whatever two points you want and you will always get the same slope.
</span>