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 9a + a = 6a + 7z - 4 for a in terms of z.
| 2z - 1\(\frac{1}{3}\) | |
| z + 1\(\frac{1}{5}\) | |
| -\(\frac{1}{6}\)z - \(\frac{2}{3}\) | |
| 1\(\frac{3}{4}\)z - 1\(\frac{1}{4}\) |