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 -4a - 6a = -2a + 5z - 9 for a in terms of z.
| -3z - \(\frac{2}{3}\) | |
| -\(\frac{3}{4}\)z + 1\(\frac{3}{4}\) | |
| -5\(\frac{1}{2}\)z + 4\(\frac{1}{2}\) | |
| -\(\frac{3}{8}\)z - \(\frac{5}{8}\) |