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 - 2a = -a + 3z - 7 for a in terms of z.
| 1\(\frac{2}{3}\)z - \(\frac{1}{3}\) | |
| -3z - 2 | |
| \(\frac{5}{8}\)z - \(\frac{7}{8}\) | |
| -\(\frac{9}{11}\)z - \(\frac{9}{11}\) |