Question

In the diagram, m angel 8= 4x°,m angle 7 = 30°, and m angle 9 = (6x – 20). Find the value of x.

Answer 1

17

Explanation:

4x+30+(6x-20)=180

4x+30+6x-20=180

10x+10=180

10x=170

x=170/10

so,x=17