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