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 -4a - 7a = -9a - 7y + 6 for a in terms of y.
| 4\(\frac{1}{4}\)y + 1\(\frac{1}{4}\) | |
| y - 1 | |
| y + 1\(\frac{1}{5}\) | |
| -4y + 1 |