Saturday morning there were 7 adults and 20 kids at pump and jump land. the morning cash registers show $236 was collected. in the afternoon there were 21 adults and 50 kids for a total amount of $618. what is the cost for 1 adult?

The cost of one adult is $8

Step-by-step explanation:

Let

x-----> the cost for one adult

y ----> the cost for one kid

we know that

-------> equation A

-------> equation B

Solve the system by elimination

Multiply the equation A by -2.5 both sides

-----> equation C

Adds equation B and equation C and solve for x

therefore

The cost of one adult is $8

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