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 -a - 9a = 6a - 7z - 5 for a in terms of z.
| \(\frac{1}{6}\)z - \(\frac{1}{2}\) | |
| 6\(\frac{1}{2}\)z - 1 | |
| -\(\frac{2}{7}\)z + \(\frac{5}{7}\) | |
| -\(\frac{10}{13}\)z + \(\frac{9}{13}\) |