Answer:
29
Step-by-step explanation:
(7-5)^2 is 4 and (20-19)^2 is 1
4+1=5
3*5=15
15+14=29
31% of 40 is 12.4 exactly
Simple. Since a straight line is 180 you can do 180-59 in which you will get 121. You can use the alternate angle theorem.
X=121
Equation: 4x+15=31
I have included a picture of my work since explaining might be difficult but the way I solved this if the beginning of algebra and I hope it makes sense.
Your welcome, Katy