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