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 8b + 7b = 7b - 4x - 9 for b in terms of x.
| -11x - 9 | |
| -2\(\frac{2}{3}\)x - 2\(\frac{2}{3}\) | |
| \(\frac{9}{10}\)x + \(\frac{9}{10}\) | |
| \(\frac{5}{13}\)x - \(\frac{4}{13}\) |