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