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