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 - 7a = -9a + 3z + 7 for a in terms of z.
| -z + \(\frac{1}{7}\) | |
| 1\(\frac{1}{6}\)z - 1 | |
| \(\frac{1}{3}\)z - 1\(\frac{1}{2}\) | |
| \(\frac{5}{8}\)z + \(\frac{7}{16}\) |