Question 1099984
c+a=867
c=867-a
8c+13a=8381
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8(867-a)+13a=8381
6936-8a+13a=8381
5a=8381-6936
5a=1445
a=1445/5
a=289 adults
867-289=578 children
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8*578+13*289=
4624+3757=$8381