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 a + 9a = 9a + 7y + 3 for a in terms of y.
| y + 1\(\frac{1}{6}\) | |
| -\(\frac{1}{13}\)y + \(\frac{7}{13}\) | |
| \(\frac{3}{8}\)y + \(\frac{5}{16}\) | |
| \(\frac{1}{4}\)y - \(\frac{3}{8}\) |