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 = 6a + 3y + 8 for a in terms of y.
| -y - 3 | |
| 10y - 2 | |
| \(\frac{6}{7}\)y - 1\(\frac{1}{7}\) | |
| \(\frac{1}{3}\)y + \(\frac{7}{12}\) |