Answer:
The ratio must be guaranteed.
Therefore,
18/6 =12/x
=> x= 6*12/18 = 4
The answer would be fifteen
Answer:
25 students
Step-by-step explanation:
.8x = 20
x = 25 students
1- multiply bottom equation by -3
3x+3y=27
-3x+111= 33
111+3y=60
3y=60-111
3y= -51
y= -17
Replace y in first equation with -17
3x+3(-17)= 27
3x-51=27
3x=27+51
x=26
Here, rest of them in the pic..