Question

I need to solve for angle A, a quick response would be appreciated!

Answer 1

The answer is 21 which is A

Answer 2

x = 21

Step-by-step explanation:

The two remaining angles must add to 90 degrees since a triangle adds to 180

3x+6 +x = 90

4x+6 =90

4x = 90-6

4x = 84

Divide by 4

4x/4 = 84/4

x = 21