+0  
 
0
702
2
avatar

What is the sum of three consecutive even integers if the sum of the first and third integers is $128$?

 Sep 10, 2017
 #1
avatar
0

The numbers would be: 62 + 64 + 66 =192,  and 62 + 66 = 128.

 Sep 10, 2017
 #2
avatar+128079 
+2

 

Let the first integer  = N

 

So.....the 3rd integer is N + 4

 

And

 

N + N + 4 = 128   simplify

 

2N  +  4  =  128       subtract 4 from both sides

 

2N  =  124                divide both sides by 2

 

N  =  62

 

N + 4  =  66

 

62 + 66  =  128

 

 

cool cool cool

 Sep 10, 2017

2 Online Users

avatar
avatar