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 10a + 4a = 9a - 9z - 4 for a in terms of z.
| -13z - 4 | |
| 2z + 4 | |
| -\(\frac{3}{4}\)z + \(\frac{1}{2}\) | |
| 1\(\frac{1}{5}\)z - \(\frac{3}{5}\) |