Am going correct with this one.

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?

S-4000=1
S=1+4000
S=4001 of species we have on this earth this year

Where did the 1 come from? The number on earth this year is S-4000.

I thought it was asking for me to solve. Or just the answer is s-4000

The answer is S-4000 if you posted the entire question. Unless there is more to the problem, the 1 has no place and S-4000 is the answer to the number of species on earth this year.

It seems that there might be some confusion regarding the solution to the problem. Let's try to clarify it.

Based on the given information, we know that the Earth is losing 4000 species of plants and animals every year. We are also given the variable S, which represents the number of species living last year.

To find the number of species on Earth this year, we need to subtract the number of species lost (4000) from the number of species last year (S). Therefore, the equation would be:

Number of species this year = S - 4000

The solution to the problem is not S-4000=1, but rather, S-4000 represents the number of species on Earth this year.

It is important to carefully read and understand the question, as well as use proper mathematical reasoning and notation when solving problems.