make an equation and solve for x, 25 points.

Answer:
Equation : x + 40° + 91° + 53° = 180°
All angles in a triangle add up to 180°
The value of x is -4.
Now,
x + 40 + 91° + 53° = 180° ( ▼ Sum of three
angle of triangle is 180°)
x + 184 = 180
x = 180 - 184
▲ x = - 4
This is a Right answer....
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