Question

Find three consecutive even numbers such that the sum of the first and the third is 40

Answer 1

x, x+2,x+4 are numbers
x+x+4=40
2x+4=40
2x=40-4
2x=36
x=36/2
x=18
x+2=18+2=20
x+4=18+4=22
numbers are
18,20,22

Answer 2

let the three consecutive even numbers are

x+2 , x +4 , x +6

given sum = 40

(x+2)+(x+6) = 40

2x+ 8= 40

2x = 40 - 8

x = 32/2

x = 16.

x+2 = 16 +2 = 18

x + 4 = 16 + 4 = 20

x + 6 = 16 + 6 = 22

hence three consecutive even numbers are 18, 20 , 22