18-12-2017
Mathematics

contestada

On a certain hot summer's day, 529 people used the public swimming pool. The daily prices are $1.75 for children and $2.25 for adults. The receipts for admission totaled $1118.75. How many children and how many adults swam at the public pool that day?

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vunderkid vunderkid

21-12-2017

{a+c=529
{1.75c+2.25a=1118.75

{9a+9c=4761
-
{7c+9a=4475
2c=286
c=143
a=529-143=386
There are 143 children and 386 adults used the public swimming pool.

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