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 -8a - a = 5a - 5z + 7 for a in terms of z.
| 2\(\frac{1}{2}\)z - 4 | |
| -2\(\frac{1}{7}\)z + \(\frac{6}{7}\) | |
| \(\frac{4}{13}\)z - \(\frac{7}{13}\) | |
| -1\(\frac{1}{4}\)z + \(\frac{3}{4}\) |