Question 1101260
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...450 tickets for the community play tickets for children cost two dollars in tickets for adults cost five dollars James sold $1800 worth of tickets...
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c, children's
y, adult's

{{{system(c+y=450,2c+5y=1800)}}}



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 how many tickets for adults?
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{{{2(450-y)+5y=1800}}}

{{{900-2y+5y=1800}}}
{{{3y=900}}}

{{{highlight(y=300)}}}