the ticket of 2 adult and 1 child is 3900. 3 adult and 2 children is 6300. find the fair and seat cost
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Step-by-step explanation:
x- cost for an adult
y- cost for a child
2x + y = 3900
3x + 2y = 6300
Multiply 1st equation by 2
4x + 2y = 7800
( - )
3x + 2y = 6300
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x + 0y = 1500
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x = 1500
2x + y = 3900
y = 3900 - 2x
sub x=1500
y = 3900 - 2 (1500)
y = 3900 - 3000
y = 900
cost for an adult = 1500
coat for a child = 900
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