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 -5a + 6a = 3a + 9x + 7 for a in terms of x.
| \(\frac{1}{5}\)x + \(\frac{9}{10}\) | |
| -7x + 4 | |
| -\(\frac{3}{8}\)x - \(\frac{7}{8}\) | |
| 2x + 3 |