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