document.write( "Question 698414: there are 13 animals in the barn.some are chicken some are pigs. there are 40 legs in all. how many of each animal are there? \n" ); document.write( "
Algebra.Com's Answer #430639 by htmentor(1343)![]() ![]() You can put this solution on YOUR website! Let c = the number of chickens \n" ); document.write( "Let p = the number of pigs \n" ); document.write( "The total number of animals is 13: \n" ); document.write( "c + p = 13 -> p = 13 - c \n" ); document.write( "There are 40 legs in all: \n" ); document.write( "2c + 4p = 40 \n" ); document.write( "2c + 4(13-c) = 40 \n" ); document.write( "Solve for c: \n" ); document.write( "2c + 52 - 4c = 40 \n" ); document.write( "2c = 12 \n" ); document.write( "c = 6 \n" ); document.write( "So there are 6 chickens and 7 pigs \n" ); document.write( " |