Answer:
A
Step-by-step explanation:
The angles in a quadrilateral add up to 360 degrees.
100 + 87 + 106= 293
360 - 293 = 67
If I'm right, the answers should be 40.
yo need more photos
Combining like terms on the left-hand side gives us Adding 10 to both sides gives and dividing both sides by 5 gives our answer of