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