Question

answer the tick mark question

Answer 1

It is simple add 50 +2x+30 = 180 then 80 +2x = 180 after this x = 50

Answer 2

AOB = 180°
That is AOM + MON + NOB = 180°
= 50° + 30° + 2x = 180°
= 80 + 2x = 180°
= 180 - 80 = 2x
= 100 = 2x
= x = 100/2
= x = 50 x 2
= 100.
X = 100

We can verify our answer by adding the three angles:
100° + 50° + 30° = 180°