Elementary Geometry for College Students (5th Edition)

According to the problem AB = BC = CD, therefore we can substitute x in for all three line segments. Step 1: AB + BC + CD = AD Step 2: x + x + x = AD Step 3: Substitute 32.7 for AD. x + x + x = 32.7 Step 4: Simplify the left side of the equation. 3x = 32.7 Step 5: Divide both sides by 3. $\frac{3x}{3}$ = $\frac{32.7}{3}$ Step 6: Simplify. x = 10.9 AB = 10.9