SOLUTION: THE TOTAL OF THE AGES OF ANIL,RAHUL,RAJISH IS 80 YEARS.WHAT WAS THE TOTAL OF THEIR AGES THREE YEARS AGO?

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Question 752317: THE TOTAL OF THE AGES OF ANIL,RAHUL,RAJISH IS 80 YEARS.WHAT WAS THE TOTAL OF THEIR AGES THREE YEARS AGO?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
You must subtract +3+ from each of their ages.
Suppose their ages are +a+, +b+, and +c+
then +a+%2B+b+%2B+c+=+80+
Subtracting +3+ from each of their ages,
+a+-+3+%2B+b+-+3+%2B+c+-+3+=+a+%2B+b+%2B+c+-+9+
Now, for the right side, I make the substitution
+a+%2B+b+%2B+c+=+80+
+a+-+3+%2B+b+-+3+%2B+c+-+3+=+80+-+9+
+80+-+9+=+71+
Three years ago, the sum of their ages was 71