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