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 -2a + 9a = 2a - 6z - 4 for a in terms of z.
| 3\(\frac{3}{4}\)z + 1 | |
| \(\frac{1}{12}\)z - \(\frac{3}{4}\) | |
| 4\(\frac{1}{4}\)z + \(\frac{1}{4}\) | |
| \(\frac{1}{2}\)z + \(\frac{1}{10}\) |