When solving an equation with two variables, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
Solve 3a - 9a = 6a + 3z - 9 for a in terms of z.
| \(\frac{11}{13}\)z + \(\frac{8}{13}\) | |
| 9z + 7 | |
| -z - 6 | |
| -4z + 3 |