document.write( "Question 18346: A set of children's blocks contains 3 shapes: Longs, flats & cubes
\n" ); document.write( "There are 3 times as many longs as cubes and 30 fewer flats than longs. If there are 600 blocks in all, how many longs are there?
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Algebra.Com's Answer #8775 by pwac(253)\"\" \"About 
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let x=cubes
\n" ); document.write( "so 3x is amount of longs
\n" ); document.write( "and flats=3x-30
\n" ); document.write( "put these together to total 600
\n" ); document.write( "x+3x+3x-30=600
\n" ); document.write( "7x-30=600 add 30 to both sides
\n" ); document.write( "7x=630 divide both sides by 7
\n" ); document.write( "x=90
\n" ); document.write( "so number of longs =3x = 3 X 90=270
\n" ); document.write( "270 longs
\n" ); document.write( "Pete
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