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 3a + 8a = 6a - 2z + 5 for a in terms of z.
| 3\(\frac{1}{3}\)z - 1\(\frac{2}{3}\) | |
| -\(\frac{1}{3}\)z - 1\(\frac{1}{3}\) | |
| -z + 4\(\frac{1}{2}\) | |
| \(\frac{4}{13}\)z - \(\frac{8}{13}\) |