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