how to solve this problem

Answer:
Step-by-step explanation:
find the missed interior angles
180 = 48 + 56 + y
180 = 104 + y
y = 180 - 104
y = 76°
Find x
180 - 76 = 104°
[tex]\text{The exterior angle is equal to the sum of two opposite interior angles.}\\\\x=56^{\circ} + 48^{\circ} = 104^{\circ}[/tex]