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 3a - 8a = 8a - 9z + 1 for a in terms of z.
| -z + 1 | |
| \(\frac{1}{5}\)z - \(\frac{1}{5}\) | |
| -1\(\frac{2}{5}\)z - 1 | |
| 1\(\frac{3}{8}\)z + \(\frac{1}{8}\) |