kam3864
19.05.2020 •
Mathematics
If there are 3 classrooms that each have 25 desks and there are a total of 87 students, how many more desks need to be added to a 4th classroom, that was originally empty, so that each of the students has a desk to sit in?
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Ответ:
12
Step-by-step explanation:
If there are 3 classrooms that each have 25 desks and there are a total of 87 students, how many more desks need to be added to a 4th classroom, that was originally empty, so that each of the students has a desk to sit in?
25 * 3 = 75
87 - 75 = 12
Ответ:
x + y + z = 180
y + z = 180 - x
or
x = 180 - y - z
In this approach, we can't give the actual values since there are no values presented.