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