10 = ax - 3b
First, add 3b to both sides. / Your problem should look like: 10 + 3b = ax.
Second, divide both sides by a. / Your problem should look like: \(\frac{10 + 3b}{a}\) = x.
Third, switch sides. / Your problem should look like: x = \(\frac{10 + 3b}{a}\) which is your answer.