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 6b + 3b = -7b - 9z - 4 for b in terms of z.
| \(\frac{1}{12}\)z - \(\frac{2}{3}\) | |
| -\(\frac{12}{13}\)z - \(\frac{4}{13}\) | |
| -1\(\frac{1}{2}\)z - 3\(\frac{1}{2}\) | |
| -\(\frac{3}{7}\)z + 1\(\frac{1}{7}\) |