#### Answer

x=3

#### Work Step by Step

We need to get the x alone. Thus, we cancel out the subtraction by adding 3.7 on both sides. This leaves us with the equation $15.9=5.3x$. In order to cancel out multiplication, we use division, so we divide both sides by 5.3 to get that x=3. We plug 3 in for x and confirm that our answer is, indeed, correct.