document.write( "Question 1144740: Ben has some marbles. 4/7 of the marbles are red and the rest are blue. If he has 18 blue marbles, how many marbles does Ben have altogether ? \n" ); document.write( "

Algebra.Com's Answer #765932 by MathTherapy(10552) $\"\"$ $\"About$

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Ben has some marbles. 4/7 of the marbles are red and the rest are blue. If he has 18 blue marbles, how many marbles does Ben have altogether ?
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With  being red,  is blue.
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document.write( "We then get the following PROPORTION, with T being the total number of marbles:      
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document.write( " ------ Cross-multiplying
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document.write( "3T = 7(18) ----- Cross-multiplying
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document.write( "T, or total number of marbles =  \n" );
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