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 + 4a = 3a + 6z + 9 for a in terms of z.
| z + 4\(\frac{1}{2}\) | |
| \(\frac{1}{2}\)z - 1\(\frac{1}{4}\) | |
| -1\(\frac{4}{7}\)z - \(\frac{5}{7}\) | |
| \(\frac{4}{11}\)z - \(\frac{2}{11}\) |