A farmer owns a total of 19 ducks and horses. The ducks and horses have 64 legs altogether. How many horses are there?
+14913 A farmer owns a total of 19 ducks and horses. The ducks and horses have 64 legs altogether. How many horses are there?
\(x \ ducks\)
\(19-x \ horses\)
\(2x+4(19-x)=64\) calculate
\(2x+76-4x=64\) sort them
\(4x-2x=76-64\) calculate
\(2x=12\) divide by 2
\(x=6\ ducks\)
\(19-x =19-6 =13 \ horses\)
\(2\times 6+4\times13=64\)
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