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 -7a - 6a = -9a - 7z + 1 for a in terms of z.
| -\(\frac{3}{8}\)z + 1 | |
| -\(\frac{1}{8}\)z - \(\frac{1}{4}\) | |
| -\(\frac{2}{11}\)z - \(\frac{2}{11}\) | |
| -\(\frac{1}{2}\)z + \(\frac{1}{2}\) |