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