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 -9a + 6a = -2a - 7z - 7 for a in terms of z.
| 1\(\frac{1}{3}\)z + 1\(\frac{1}{3}\) | |
| 9z + 5 | |
| z + 2 | |
| 1\(\frac{6}{7}\)z + 1 |