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 + 3a = 3a + 7z - 3 for a in terms of z.
| 6\(\frac{1}{2}\)z - 2 | |
| -z + \(\frac{3}{4}\) | |
| 5z - 2\(\frac{1}{2}\) | |
| -2z + 3 |