Polygon A,B,C,D,E and polygon L,M,N.O.K
Its 37.5 just device them and round to the nearest tenth.
Answer:

Step-by-step explanation:
Hope this helps
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-3x+7y=5 (x2) -> -6x+14y=10
-6x+14y=10
-8x+14y=-10
——————— -
2x=20
x=20/20
x=1
Susbstitute x=1,
-8x+14y=-10
-8(1)+14y=-10
-8+14y=-10
14y=-10+8
14y=-2
y=-2/14
y=-1/7
I hope it helps