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 - 9a = 6a + 3y + 2 for a in terms of y.
| -\(\frac{12}{13}\)y - \(\frac{2}{13}\) | |
| -\(\frac{5}{7}\)y + \(\frac{2}{7}\) | |
| 12y + 7 | |
| -11y - 6 |