9514 1404 393
Answer:
∠E = 48°
Explanation:
The sum of angles in a quadrilateral is 360°.
(5x +3)° +88° +(10x +7)° +127° = 360°
15x = 135 . . . . divide by °; subtract 225
x = 9 . . . . . . . . divide by 15
Then angle E is ...
∠E = (5·9 +3)°
∠E = 48°