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