Find three consecutive number whose sum is 81
Answers
Let the numbers be x,x+1,x+2
X+x+1+x+2=81
3x+3=81
3x=81-3
3x=78
x=78/3
x=26
x+1=26+1=27
x+2=26+2=28
The numbers are 26,27,28
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Take first number = x
then 2nd number = x+1
also 3rd number = x+2
sum of these three numbers = x + x+1 + x+2
x + x+1 + x+2 = 81
3x + 3 = 81
3x = 81 - 3
3x = 78
x = 78 ÷ 3
x = 26
x +1 = 26 + 1
= 27
x + 2 = 26 + 2
= 28
three numbers are 26 , 27 , 28