Question

Please help me, I forgot how to do this):

Answer 1

x = 8

Explanation:

Recall that the interior angles of a triangle always add up to 180 degrees.

Therefore: 77 + 50 + 7X - 3 = 180, or:

77 + 7X - 3 = 130, or:

7x = 56

Dividing both sides by 7 yields x = 8