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Brums [2.3K]
3 years ago
8

Helpppppp Someone please tell me how to do it step-by-step and there’s 2 questions :(

Mathematics
1 answer:
azamat3 years ago
5 0

Answer:

1. The angles of a triangle added up all together is 180. So, we can solve a as an equation!

36+57+a=180.

From this, we can figure out a:

a=87

2. The same goes for this one, just a bit different. We write our equation like this:

3x+90=180

we solve this:

3x=90

we divide both sides by 3 and get:

x=30

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