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 5a - 9a = 7a + 2z + 4 for a in terms of z.
| z + \(\frac{9}{10}\) | |
| -5\(\frac{1}{2}\)z - 2 | |
| \(\frac{1}{2}\)z - \(\frac{1}{4}\) | |
| 1\(\frac{5}{12}\)z - \(\frac{3}{4}\) |