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 + 8a = 9a - 7y + 2 for a in terms of y.
| 2\(\frac{1}{7}\)y - \(\frac{2}{7}\) | |
| -\(\frac{2}{3}\)y + \(\frac{1}{3}\) | |
| -1\(\frac{2}{5}\)y + 1 | |
| -3y + 4\(\frac{1}{2}\) |