Additions 80586

Each of the three additions is 5 more than the previous one. The sum of all is 78. Which numbers are these?

Correct answer:

a =  21
b =  26
c =  31

Step-by-step explanation:

a+(a+5)+(a+10)=78  3a=63  a=363=21  a=21
c=b+5=26+5=31   Verifying Solution:  s=a+b+c=21+26+31=78

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