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fiasKO [112]
3 years ago
7

Instructions:Type the correct answer in each box.

Mathematics
1 answer:
CaHeK987 [17]3 years ago
4 0
C = children, a = adults
c + a = 700...c = 700 - a
7c + 10a = 6400

7(700 - a) + 10a = 6400
4900 - 7a + 10a = 6400
3a = 6400 - 4900
3a = 1500
a = 1500/3
a = 500

a + c = 700
500 + c = 700
c = 700 - 500
c = 200

there were 200 children and 500 adults
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