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 -9a - 8a = 6a - 7y - 2 for a in terms of y.
| -3y + 2 | |
| 1\(\frac{2}{9}\)y - \(\frac{1}{9}\) | |
| 6\(\frac{1}{2}\)y - 2\(\frac{1}{2}\) | |
| -\(\frac{1}{15}\)y + \(\frac{2}{15}\) |