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 - 8a = -6a - 9z - 3 for a in terms of z.
| -1\(\frac{2}{5}\)z - \(\frac{3}{5}\) | |
| 1\(\frac{1}{3}\)z + \(\frac{1}{3}\) | |
| -4\(\frac{1}{2}\)z + 1 | |
| \(\frac{1}{3}\)z + 1 |