Ava45018
Ava45018
02-06-2018
Mathematics
contestada
Helppppp how do u do this????
Respuesta :
mkryukova19
mkryukova19
02-06-2018
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 4
x
ml.
n+21 = 4x
3)
n - 3x = 5
- (n+21 = 4x)
-------> -n -21=-4x
n - 3x = 5
-n -21= - 4x
-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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