SOLUTION: Three years from now, Judith will be y years old. How old was she 4 years ago

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Question 832203: Three years from now, Judith will be y years old. How old was she 4 years ago
Answer by JulietG(1812) About Me  (Show Source):
You can put this solution on YOUR website!
She will be y-7 years old. Think of her age on a number line.
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We can plug in numbers to be certain. Let's say Judith is 12 years old right now. In three years, she'll be 15. 4 years ago she was 8. 15-8=7 (y-7)