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 -8a - 9a = 8a - 3z + 2 for a in terms of z.
| -3\(\frac{1}{2}\)z + 2\(\frac{1}{2}\) | |
| 4z + 9 | |
| z + 1\(\frac{2}{3}\) | |
| -\(\frac{3}{8}\)z - \(\frac{1}{8}\) |