Answer:
x = 12.5
Explanation:
The inside angles of a triangle should sum 180°
then
2x + (7x+5) + (180 - (11x-25)) = 180
2x + 7x + 5 + 180 - 11x -25 = 180
-2x - 25 = 0
2x = -25
x -25/2
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