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PLEASE HELP i have less than 20 mins left

PLEASE HELP I Have Less Than 20 Mins Left class=

Sagot :

3a) Answer: 84 degrees

Step-by-step explanation:

3x + 2(x+20)= 180 (total sum of angles in a triangle is 180 degrees)

5x+40 = 180

5x = 140

x= 28

3x= 28 x 3

   = 84