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 = 6a + 9z - 4 for a in terms of z.
| -\(\frac{7}{9}\)z + \(\frac{4}{9}\) | |
| -\(\frac{3}{4}\)z + 1\(\frac{1}{2}\) | |
| -\(\frac{5}{6}\)z - \(\frac{1}{6}\) | |
| -\(\frac{5}{8}\)z - \(\frac{7}{8}\) |