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 + a = -2a + 9z + 8 for a in terms of z.
| z - \(\frac{1}{3}\) | |
| \(\frac{1}{7}\)z + \(\frac{6}{7}\) | |
| -z - \(\frac{1}{2}\) | |
| \(\frac{8}{9}\)z + \(\frac{8}{9}\) |