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 6a + 2a = -9a + 9z + 5 for a in terms of z.
| -5z - 9 | |
| \(\frac{4}{5}\)z - \(\frac{1}{5}\) | |
| 3z - \(\frac{1}{2}\) | |
| \(\frac{7}{15}\)z + \(\frac{1}{3}\) |