Question

Does somebody knows how to solve this problem?

Answer 1

Angle A = 35 degrees

Angle B = 124 degrees

Angle C = 21 degrees

Explanation:

Triangle Theorems add up to 180 degrees

3x − 7 + 9x − 2 + x + 7 = 180

Add the number:

3x − 2 + 9x + x = 180

Combine Like Terms:

13x − 2 = 180

Simplify:

13x = 182

Divide both sides of the equation by the same term

x = 14

Then replace the x with 14

Angle A

3x - 7 =

3 (14) - 7=

= 35

Angle B:

9x - 2 =

9 (14) - 2 =

= 124

Angle C:

x + 7 =

14 + 7 =

= 21