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 + 6a = -7a - 3z + 9 for a in terms of z.
| -\(\frac{1}{9}\)z - \(\frac{1}{9}\) | |
| 7z + 1 | |
| -\(\frac{9}{14}\)z + \(\frac{9}{14}\) | |
| \(\frac{5}{12}\)z + \(\frac{1}{6}\) |