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A farmer was counting his cows and chickens. He counted 13 heads and 36 legs. How many cows does he have?
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A farmer was counting his cows and chickens. He counted 13 heads and 36 legs. How many cows does he have?

User Dgumo
by
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Cows (C)→ 4 legs
Chickens (c) → 2 legs
C+c=13 |×4
4C+2c=36

4C+4c=52
4C+2c=36
--------------- (-)
2c=16
c=8 chickens

C=13-8
C=5 cows
User Chhorn Soro
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