sammyromen sammyromen

11-09-2017
Mathematics

contestada

Select the correct response for three consecutive integers whose sum is 42. A) 12,13,14. B)9,10,11. C)13,14,15 D)14,15,16

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helper103 helper103

11-09-2017

i feel like the answer would be A) 12,13,14.

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11-09-2017

Hello,
it must be:
x+(x+1)+(x+2)=42
from which:
x+x+1+x+2=42;
3x+3=42;
3x=42-3;
3x=39;
x=39:3=13
the first number is 13;
the second number is:
13+1=14
The third number is:
13+2=15

The answer is C.

Bye :-)

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