document.write( "Question 828186: In a mixture of concrete, there are 4 lbs of cement mix. If the mixture contains a total of 250 lbs of these two ingredients, how many pounds of gravel are there? \n" ); document.write( "
Algebra.Com's Answer #499125 by josgarithmetic(39618)\"\" \"About 
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Is this concrete supposed to be composed of just cement and gravel, and no other dry matter? If so, go this way:\r
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\n" ); document.write( "\n" ); document.write( "g = pounds of gravel.
\n" ); document.write( "4 pounds cement-mix plus g pounds of gravel equals 250 pounds concrete mixture.
\n" ); document.write( "4+g=250
\n" ); document.write( "g=250-4
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