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 + 3a = 5a - 6z - 9 for a in terms of z.
| \(\frac{9}{14}\)z + \(\frac{9}{14}\) | |
| -\(\frac{11}{16}\)z + \(\frac{1}{4}\) | |
| -12z - 7 | |
| -\(\frac{10}{11}\)z + \(\frac{8}{11}\) |