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 - 3a = 9a + 6z - 9 for a in terms of z.
| \(\frac{4}{5}\)z + \(\frac{2}{15}\) | |
| -1\(\frac{2}{7}\)z + 1\(\frac{2}{7}\) | |
| \(\frac{3}{10}\)z - \(\frac{1}{5}\) | |
| 2\(\frac{1}{2}\)z - 1\(\frac{1}{2}\) |