There are three consecutive even integers. If twice the first integer added to the third is 268,258, what are all three integer?

1 Answer
Sep 19, 2017

89418 , 89420 , 89422

Explanation:

Let #n# be any positive integer. Then #2n# is a even integer (multiplying by 2 makes the number even, because 2 will be a factor of that number and all even numbers are divisible by 2).

#2n + 2# is the next integer and #2n + 4# the next.

(Adding 2 to an even number gives you the next even number, adding 2 again the next even number and so on)

So we have three consecutive integer:

#2n , (2n + 2) ,(2n + 4)#

Twice the first added to the third is #268,258#

#2(2n) + (2n + 4) = 268258#

Solving for #n#:

#4n + 2n + 4 = 268258#

#6n = 268254#

#n = color(blue)(44709)#

So we have:

#2(color(blue)(44709)) , (2(color(blue)(44709)) + 2) , (2(color(blue)(44709)) + 4) ->#

89418##

89420

89422