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 9a + 2a = 3a - 7x - 7 for a in terms of x.
| -1\(\frac{3}{7}\)x - 1\(\frac{1}{7}\) | |
| x - 3\(\frac{1}{2}\) | |
| 4x - 7 | |
| -1\(\frac{1}{2}\)x - 1\(\frac{1}{6}\) |