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 - 2a = a - 9z - 9 for a in terms of z.
| \(\frac{12}{13}\)z - \(\frac{1}{13}\) | |
| -3\(\frac{1}{2}\)z - 4\(\frac{1}{2}\) | |
| -1\(\frac{3}{4}\)z - \(\frac{3}{4}\) | |
| z - 2\(\frac{1}{4}\) |