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 7a - 4a = 6a - 7y - 1 for a in terms of y.
| 1\(\frac{1}{8}\)y - 1 | |
| 1\(\frac{1}{2}\)y + 1\(\frac{3}{4}\) | |
| -3y - 1 | |
| y - \(\frac{3}{4}\) |