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 -4a + 7a = -3a - 3z - 9 for a in terms of z.
| -1\(\frac{1}{2}\)z + \(\frac{5}{6}\) | |
| 10z + 9 | |
| -1\(\frac{1}{3}\)z - \(\frac{1}{2}\) | |
| 2\(\frac{4}{5}\)z + \(\frac{1}{5}\) |