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 -7a + a = -3a - 7z - 1 for a in terms of z.
| 2z + \(\frac{1}{4}\) | |
| \(\frac{5}{9}\)z - \(\frac{2}{9}\) | |
| 2\(\frac{1}{5}\)z - 1\(\frac{3}{5}\) | |
| -5z + 9 |