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 + 9a = 2a + 7z + 4 for a in terms of z.
| -\(\frac{3}{10}\)z + \(\frac{3}{5}\) | |
| 1\(\frac{1}{2}\)z - 4 | |
| z - 2\(\frac{1}{2}\) | |
| \(\frac{2}{3}\)z - 1\(\frac{1}{3}\) |