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 + 2a = 7a - z + 8 for a in terms of z.
| -\(\frac{2}{3}\)z - 1 | |
| \(\frac{8}{9}\)z + \(\frac{1}{3}\) | |
| -3z - 9 | |
| \(\frac{3}{10}\)z - \(\frac{4}{5}\) |