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 -a - 2a = 4a + 6z + 6 for a in terms of z.
| -1\(\frac{3}{5}\)z - 1\(\frac{1}{5}\) | |
| -\(\frac{3}{5}\)z - \(\frac{7}{10}\) | |
| \(\frac{1}{3}\)z + 1 | |
| z + \(\frac{9}{13}\) |