document.write( "Question 418743: There are 7 red marbles for every 3 blue marbles in a collection. the collection has 420 more red marbles than blue marbles. How many marbles are there in the collection. show the work \r
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Algebra.Com's Answer #292984 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "420 more red marbles than blue marbles
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document.write( "Let x and (x +420)represent the amount of blue and red respectively
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document.write( "Question Sets Up the Proportion
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document.write( "      |Cross Multiplying to solve
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document.write( "      7x = 3(x+420) 
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document.write( "      4x = 1260
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document.write( "       x = 315, blue marbles and 735 red marbles  (315+420)\r
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document.write( "CHECKING our Answer***
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document.write( " 735/315 = 7/3 \n" );
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