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Sagot :
Answer:
So what we need to do is find out how many are left after taking away the 8th graders.
15x - 8x = 7x
so we have part of that
7x
Then 13xy - 8xy
5xy
10y - 8y
2y
this means that for 7th graders its
7x + 5xy + 2y
Step-by-step explanation:
Answer:
7x + 5xy + 2y is the number of 7th graders in the school.
Step-by-step explanation:
We are told that the total number of students is 15x + 13xy + 10y for both, 7th and 8th grade. We are also told that there are 8x + 8xy + 8y 8th graders. Incase you weren't able to figure out by this detail, we need to subtract to find the answer. We need to subtract the total students, 15x + 13xy + 10y, from the 8th graders, 8x + 8xy + 8y.
The steps would look like this:
15x + 13xy + 10y
— 8x + 8xy + 8y
---------------------------
7x + 5xy + 2y
15 - 8 = 7
13 - 8 = 5
10 - 8 = 2
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