Answer:
X=12
Step-by-step explanation:
Khan Academy
Answer:
121
Step-by-step explanation:
180°-74° = 106°
106°= x-15°
106+15= X
x= 121
(correct me if im wrong plz)
First of all you have to make them equal to each other. What I mean is the following
3x+20=2x+40
Then you should just solve for x