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