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 b - 3b = 9b + 7x + 7 for b in terms of x.
| -13x - 9 | |
| -1\(\frac{1}{4}\)x - \(\frac{7}{8}\) | |
| x + \(\frac{4}{9}\) | |
| 1\(\frac{1}{2}\)x + 3 |