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 8a + 4a = 9a + 9x + 8 for a in terms of x.
| -5x - 8 | |
| \(\frac{1}{5}\)x + 1\(\frac{1}{5}\) | |
| -\(\frac{2}{3}\)x + 1\(\frac{2}{3}\) | |
| 1\(\frac{1}{2}\)x + 3\(\frac{1}{2}\) |