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 - 8a = -6a + 4z - 1 for a in terms of z.
| -4z - 1 | |
| \(\frac{4}{5}\)z - \(\frac{1}{15}\) | |
| -8z - 1\(\frac{1}{2}\) | |
| \(\frac{1}{2}\)z + 2\(\frac{1}{2}\) |