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lbvjy [14]
3 years ago
7

Can someone make a formula for this problem?

Mathematics
1 answer:
Usimov [2.4K]3 years ago
7 0

Answer:


Step-by-step explanation:

solution 1 :

adult : 7 - x

child : x

total spend : 54.50 = (7 - x) * 9.5 + x * 6.5

we solve : 54.50 = 66.5 - 3x  ,  x = 4

solution 1 :

adult : y

child : x

x + y = 7.......(1)

total spend : 54.50 = y * 9.5 + x * 6.5........(2)

we solve : x= 4 , y = 3

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We have the following:

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2.

let x a 30% silver

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