Four consecutive even integers sum to-20. What is the greatest of the 4 integers?

해법

F o u r co n sec u t i v e e v e n in t e g ers s u m t o - 20. Wha t i s t h e g re a t es t o f t h e 4 in t e g ers ?

The largest number : - 2

솔루션 단계

Represent the numbers with

x

First number : x

Consecutive number 1 : x + 2

Consecutive number 2 : x + 4

Consecutive number 3 : x + 6

A.T.Q.:

x + x + 2 + x + 4 + x + 6 = - 20

x + x + 2 + x + 4 + x + 6 = - 20

해결 :

x = - 8

x + 2 = - 8 + 2 = - 6

x + 4 = - 8 + 4 = - 4

x + 6 = - 8 + 6 = - 2

Select the largest solution:

- 2

The largest number : - 2