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 -5a + 4a = -4a + z + 5 for a in terms of z.
| 3z - 5 | |
| 1\(\frac{1}{7}\)z + \(\frac{2}{7}\) | |
| -\(\frac{1}{2}\)z + \(\frac{1}{2}\) | |
| 1\(\frac{1}{8}\)z + \(\frac{1}{4}\) |