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 = -9a - 2x + 9 for a in terms of x.
| 5\(\frac{1}{2}\)x - 1\(\frac{1}{2}\) | |
| -1\(\frac{1}{14}\)x - \(\frac{5}{14}\) | |
| x - \(\frac{1}{4}\) | |
| \(\frac{1}{2}\)x + 4\(\frac{1}{2}\) |