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