contestada

In ΔWXY, W Y ‾ WY is extended through point Y to point Z, m ∠ Y W X = ( 2 x + 12 ) ∘ m∠YWX=(2x+12) ∘ , m ∠ W X Y = ( 2 x + 5 ) ∘ m∠WXY=(2x+5) ∘ , and m ∠ X Y Z = ( 7 x − 1 ) ∘ m∠XYZ=(7x−1) ∘ . What is the value of x ? x?