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