Question

9x+21x=180 How do you find the measure of each angle

Answer 1

54°, 126°

Explanation:

Add up the terms and divide by the coefficient of x. Then use that value of x to find the value of each of the terms.

9x + 21x = 180

30x = 180 . . . . . collect terms

x = 6 . . . . . . . . . .divide by 30

Then the terms are ...

9x = 9·6 = 54

21x = 21·6 = 126

We assume this means your angles are 54° and 126°.