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