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 - 3a = -7a - 3z - 2 for a in terms of z.
| z - 1 | |
| z - \(\frac{1}{7}\) | |
| -1\(\frac{3}{4}\)z - 1 | |
| z - \(\frac{1}{10}\) |