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 9a + 7a = -6a + 9z - 1 for a in terms of z.
| 1\(\frac{1}{2}\)z + 3\(\frac{1}{2}\) | |
| z - \(\frac{1}{7}\) | |
| -2z - 8 | |
| \(\frac{2}{15}\)z - \(\frac{1}{15}\) |