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