Question

50 points if answered please answer

Answer 1

180 = 2x-10+x+30+70
180 = 3x+90
90 = 3x
x = 30

2(30)-10 =50

Answer 2

Hello!

The interior angles of any given triangle add up to equal 180 degrees. Given this, you can set up the following equation to solve for x:

180 = 70 + (2x - 10) + (x + 30)
180 = 70 + 2x - 10 + x + 30
180 = 3x + 90
90 = 3x
30 = x

Now that you have x, substitute it into (2x - 10) to find m∠A.

2x - 10
2(30) - 10
60 - 10
50

Answer:
m∠A = 50°