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 -3a - 7a = -4a - 7x - 7 for a in terms of x.
| \(\frac{3}{14}\)x - \(\frac{5}{14}\) | |
| -1\(\frac{1}{10}\)x - \(\frac{7}{10}\) | |
| x - 7 | |
| -\(\frac{3}{7}\)x - 1\(\frac{2}{7}\) |