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 = -8a + 2z + 4 for a in terms of z.
| z - \(\frac{4}{5}\) | |
| \(\frac{1}{5}\)z + \(\frac{4}{15}\) | |
| -\(\frac{1}{7}\)z + \(\frac{3}{14}\) | |
| 5z + 1 |