document.write( "Question 850840: there are five times as many chickens as ducks. if there are 640 chickens more than ducks how many chickens and ducks are there in all? \n" ); document.write( "
Algebra.Com's Answer #512427 by JulietG(1812)\"\" \"About 
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5D = C (there are five times as many chickens as ducks)
\n" ); document.write( "D + 640 = C (there are 640 chickens more than ducks)
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\n" ); document.write( "Substitute the value of C in the second equation for the value of C in the first equation.
\n" ); document.write( "5D = C
\n" ); document.write( "5D = D + 640
\n" ); document.write( "Subtract D from each side
\n" ); document.write( "4D = 640
\n" ); document.write( "Divide each side by 4
\n" ); document.write( "D = 160
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\n" ); document.write( "If there are 160 ducks, there must be 160+640 chickens, or 800.
\n" ); document.write( "Does that fit the first equation? 800 = 5*160? Yes, they are equal.
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\n" ); document.write( "Ducks = 160
\n" ); document.write( "Chickens = 640
\n" ); document.write( "Chicken and ducks together = 640 + 160 = 800\r
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