The angle measurements in the diagram are represented by the following expressions. ∠ A = 5 x − 1 5 ∘ ∠A=5x−15 ∘ start color #11accd, angle, A, end color #11accd, equals, start color #11accd, 5, x, minus, 15, degrees, end color #11accd ∠ B = 2 x + 2 1 ∘ ∠B=2x+21 ∘ start color #28ae7b, angle, B, end color #28ae7b, equals, start color #28ae7b, 2, x, plus, 21, degrees, end color #28ae7b A A B B Solve for x xx and then find the measure of ∠ B ∠Bstart color #1fab54, angle, B, end color #1fab54: ∠ B = ∠B=start color #1fab54, angle, B, end color #1fab54, equals ∘ ∘ degrees