9 (30 + a) = 99 find a

-19

Step-by-step explanation:

1. multiply 9 and 30 to get 270

2. multiply 9 and a to get 9a

3. your equation would look like this 270+9a = 99

4. then subtract 270 from both sides to get - 171

5. the equation looks like this 9a = - 171

6. then divide 9 from both sides

7. the answer is a = - 19