SOLUTION: John is 31 years old. He is 4 years younger than 7 times the age of his son. How old is John's son?

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Question 1171547: John is 31 years old. He is 4 years younger than 7 times the age of his son. How old is John's son?
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
s, the son's age
31=7s-4-------solve thhis.

Answer by ikleyn(52776) About Me  (Show Source):
You can put this solution on YOUR website!
.

Solving backward, add 4 to 31; then divide this sum by 7.