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 -4a - 8a = 9a + 7x + 4 for a in terms of x.
| x + 1\(\frac{2}{3}\) | |
| -1\(\frac{2}{7}\)x - \(\frac{4}{7}\) | |
| -1\(\frac{2}{13}\)x - \(\frac{4}{13}\) | |
| \(\frac{2}{3}\)x + \(\frac{1}{2}\) |