∵△ABC和△ADE均是等边三角形,
∴AB=AC,AD=AE,
∠BAC=∠DAE=60°,
∴∠BAC+∠CAD=∠DAE+∠CAD,
即∠BAD=∠CAE,
在△ABD和△ACE中
{AB=AC∠BAD=∠CAEAD=AE,
∴BD=CE,
∴CA+CD=CE．