Answer:
75%
Step-by-step explanation:
Answer: 6.4b - 32
b
The sum of angles in a triangle is 180°. Therefore,
x - 11 + 48 + 90 = 180
x + 127 = 180
x = 53°
5x + 3 - 4x = 0
x + 3 = 0
x = -3
Hope this helps :)