I assume you want to find the value of w The first thing we will do is divide both sides by 0.25 4/0.25 = 0.25(w - 4.3)/0.25 The two 0.25s cancel each other. 4/0.25 = 16 16 = w - 4.3 Now we add 4.3 to both sides 16 + 4.3 = w - 4.3 + 4.3 The two 4.3s cancel each other 16 + 4.3 = 20.3 20.3 = w w = 20.3