Question

the sum of three consecutive integers add up to 51. what are the nos. ?

Answer 1

let the first ,second and third number be x,x+1,x+2 respectively.
Their sum = 51
x+x+1+x+2=51
3x+3=51
3x=48
x=16
x+1=17
x+2=18
Hence the three consecutive numbers are 16,17and 18.

Answer 2

let one consecutive interger be X

other will be. X+1 and X+2

there sum is 51 therefore equation becomes

X + X +1 + X +2 =51

=>3X+3=51

=>3X=48

=>X=16

hence no. are 16,17,18