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 - 9a = 7a - 9z - 5 for a in terms of z.
| 4\(\frac{1}{2}\)z + 2 | |
| z + 1\(\frac{1}{4}\) | |
| 3z + 3 | |
| -\(\frac{2}{3}\)z - \(\frac{3}{4}\) |