Question

please tell answer briefly​

Answer 1

Answer:

x=166.66..

Step-by-step explanation:

the sum of all angles of triangle is 180degrees

So,

x-40+x-20+x/2-10=180

2x-x/2-70=180

2x-x/2=180+70

4x-x/2=250

3x/2=250

3x=500

x=500/3

x=166.66... .