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DedPeter [7]
4 years ago
11

Please help me and explain how to do it

Mathematics
1 answer:
STALIN [3.7K]4 years ago
5 0

Answer:

<A = 50

Step-by-step explanation:

The sum of the angles of a triangle are 180

<A + <B + <C = 180

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

Combine like terms

3x +90 = 180

Subtract 90 from each side

3x+90-90 = 180-90

3x= 90

Divide each side by 3

3x/3 =90/3

x = 30

We want <A = 2x-10

                    =2(30)-10

                     =60-10

                      =50

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