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 + 8a = -a + z + 4 for a in terms of z.
| \(\frac{1}{10}\)z - \(\frac{9}{10}\) | |
| 2\(\frac{1}{2}\)z - 3\(\frac{1}{2}\) | |
| z - \(\frac{4}{7}\) | |
| -5z + 7 |