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 + 3a = 6a - 7x + 8 for a in terms of x.
| 2x - 9 | |
| 1\(\frac{1}{2}\)x + \(\frac{1}{10}\) | |
| \(\frac{10}{13}\)x - \(\frac{8}{13}\) | |
| 1\(\frac{1}{3}\)x - \(\frac{1}{3}\) |