document.write( "Question 1107465: Mrs. Rivera is filling planter boxes with soil that is 40% sand, and she buys 10 pounds of a commercial potting soil that is 19% sand.She mixes one of her soil with the 10 pounds commercial potting soil. The resulting soil mixture is 26% sand. How many pounds of soil did Mrs. Rivera use? \n" ); document.write( "
Algebra.Com's Answer #722538 by ankor@dixie-net.com(22740)\"\" \"About 
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Mrs. Rivera is filling planter boxes with soil that is 40% sand, and she buys 10 pounds of a commercial potting soil that is 19% sand.
\n" ); document.write( " She mixes one of her soils with the 10 pounds commercial potting soil.
\n" ); document.write( " The resulting soil mixture is 26% sand.
\n" ); document.write( " How many pounds of soil did Mrs. Rivera use?
\n" ); document.write( ":
\n" ); document.write( "let s = amt of soil used
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\n" ); document.write( "Write a percent sand equation
\n" ); document.write( ".40s + .19(10) = .26(s+10)
\n" ); document.write( ".40s + 1.9 = .26s + 2.6
\n" ); document.write( ".40s - .26s = 2.6 - 1.9
\n" ); document.write( ".14s = .7
\n" ); document.write( "s = .7/.14
\n" ); document.write( "s = 5 pounds of soil used
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\n" ); document.write( ":
\n" ); document.write( "See if this checks out
\n" ); document.write( ".4(5) + .19(10) = .26(5 + 10)
\n" ); document.write( "2 + 1.9 = .26(15)
\n" ); document.write( "3.9 = 3.9 \n" ); document.write( "
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