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 - 9a = 7a - 7z - 5 for a in terms of z.
| \(\frac{4}{7}\)z + 1\(\frac{1}{7}\) | |
| 2\(\frac{3}{4}\)z - 1 | |
| -\(\frac{1}{7}\)z + \(\frac{5}{14}\) | |
| -\(\frac{3}{4}\)z + \(\frac{3}{4}\) |