Answer:
2x + 8y
Step-by-step explanation:
5x + 5y - 3x + 3y
5x - 3x + 5y + 3y
2x-4+50=100
2x-4=50
2x=54
x=27º
2x+4x=90
6x=90
x=15º
The first one
I think, because if you fold it, it will form the shape.