SOLUTION: Science and medicine. It is estimated that the Earth is losing 4000 species of plants and animals every year. If S represents the number of species living last year, how many spec

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Question 69898: Science and medicine. It is estimated that the Earth is losing 4000 species of
plants and animals every year. If S represents the number of species living last year, how many species are on Earth this year?
Answer by 303795(602) About Me  (Show Source):
You can put this solution on YOUR website!
If there were S species living last year and there are 4000 less this year then there must be S - 4000 alive this year.