document.write( "Question 934484: Mike has a large tropical fish collection. He gives 2/3 of his fish to the high school. Then he gives 2/5 of the remaining fish to the elementary school. In the end, he has 30 fish left. how many fish did he have at first?\r
\n" ); document.write( "\n" ); document.write( "3/5 = 30; 3 units = 30
\n" ); document.write( "1 unit = 10
\n" ); document.write( "5 units = 50
\n" ); document.write( "50*3 = 150 fishes originally\r
\n" ); document.write( "\n" ); document.write( "Please show me how to do this problem algebraicaly.
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Algebra.Com's Answer #567477 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
Let \"+x+\" = the number of fish he started with
\n" ); document.write( "He gives \"+%28+2%2F3+%29%2Ax+\" of his fish to the high school.
\n" ); document.write( "That means he has \"+%28+1%2F3+%29%2Ax+\" left
\n" ); document.write( "--------------
\n" ); document.write( "he gives \"+2%2F5+\" of the remaining fish to the elementary school.
\n" ); document.write( "\"+%28+2%2F5+%29%2A%28+1%2F3+%29%2Ax+\" goes to the elementary school
\n" ); document.write( "--------------
\n" ); document.write( "He has \"+30+\" fish left
\n" ); document.write( "This is telling you that:
\n" ); document.write( "\"+%28+1%2F3%29%2Ax+-+%282%2F5%29%2A%281%2F3%29%2Ax+=+%283%2F5%29%2A%281%2F3%29%2Ax+\"
\n" ); document.write( "is the number of fish he has left and
\n" ); document.write( "\"+%283%2F5%29%2A%281%2F3%29%2Ax+=+30+\"
\n" ); document.write( "\"+%283%2F15%29%2Ax+=+30+\"
\n" ); document.write( "\"+%281%2F5%29%2Ax+=+30+\"
\n" ); document.write( "\"+x+=+150+\"
\n" ); document.write( "He started with 150 fish
\n" ); document.write( "----------------------
\n" ); document.write( "check:
\n" ); document.write( "\"+%282%2F3%29%2A150+=+100+\" goes to the high school
\n" ); document.write( "He has \"+50+\" left
\n" ); document.write( "\"+%282%2F5%29%2A50+=+20+\" goes to the elementary school
\n" ); document.write( "He has \"+30+\" left
\n" ); document.write( "OK\r
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