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