lalop3412
05.11.2020 •
Mathematics
I'm bored, who wanna zoom
meeting id 4283036421
meeting password NVA37n
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Ответ:
Ответ:
adult=75
Students = 200
Children=75
Step-by-step explanation:
Let x= adult tickets, y=students, z=child
x+y+z =350
Since x=z
y+2z= 350 1
20x +12y + 10z = 4650
Since y=z
12y +30z = 4650 2
Using elimination method to solve eqn 1&2
Multiply eqn 1 by 12
12y + 24z = 4200
12y +30z = 4650
Subtract equ 2 from 1
-6z =-450
z=75, x = 75
y=350 -(75+75)
y= 200 tickets