Question

Please
Please
Please

Answer 1

Explanation:

∠BEF = ∠CFE {Alternate interior angles}

5x - 10 = 4x + 20 {Subtract 4x from both sides}

5x - 4x - 10 = 20

x - 10 = 20 {Add 10 to both sides}

x = 20 +10

x = 30°