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4 years ago

Helppppp how do u do this????

Mathematics

1 answer:

otez555 [7]4 years ago

7 0

Lets x to be number of students.

1) If each students get 3 ml, then all students get 3x ml.
There was n ml.
(n-3x) ml leftover

n - 3x = 5

2) If each students get 4 ml.
then all students get 4x ml.

n+21 = 4x

3)
n - 3x = 5
- (n+21 = 4x) -------> -n -21=-4x

n - 3x = 5
<span>-n -21= - 4x
</span>-3x-21=5 - 4x
x=5+21
x=26

Answer : 26 students

Check:
x=26, n-3x = 5, n-3*26=5, n=83
n+21 = 4x
83+21=4*26
104 = 104 true

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