Question

how it came 80° ?
explain it..​

Answer 1

Answer:

See the application in the previous sentence. +30+10+50-10=80

Answer 2

In the question they have given you

(2x-10°) + (2x+30°)+(x+10°)+50°=180°

AS YOU CAN SEE THAT IN FIRST ANGLE MEASURE THEY HAVE GIVEN 2X-10° CLEAR

THEN FIRST YOU ADD all the x your answer will be 5x OK

Then add the ° - 10 +30 +10 +50 in first use the equations - + will be - only so - 10 +30 = 20° then add all other ° that is 20 + 10 +50 you will get 80°

Hope it works for you