12. The average of the following
numbers is 21. 18, 15, X, 22, 31. Find
the value of ‘x’:​

2 thoughts on “12. The average of the following<br />numbers is 21. 18, 15, X, 22, 31. Find<br />the value of ‘x’:​”

1. Step-by-step explanation:

   18+15+x+22+31

   ———————- = 21

   5

   86+x = 21×5

   86+x = 105

   x= 105-86

   x= 19

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2. VARIFIED ANSWER ✅✅

   18+15+x+22+31/5=21

   86+x/5=21

   86+x=21×5

   86+x=105

   x=105-86

   x=19

   Reply