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 7a - a = 9a - 7x + 7 for a in terms of x.
| 3x - 3\(\frac{1}{2}\) | |
| -x - 2\(\frac{2}{3}\) | |
| -\(\frac{3}{5}\)x + \(\frac{8}{15}\) | |
| -4x + 5 |