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