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 - 8a = 6a + 7z - 3 for a in terms of z.
| -\(\frac{3}{5}\)z + \(\frac{1}{2}\) | |
| -\(\frac{5}{13}\)z - \(\frac{6}{13}\) | |
| -1\(\frac{2}{13}\)z + \(\frac{3}{13}\) | |
| 6z + 7 |