document.write( "Question 554069: There are 4 black and 4 white marbles in a box. How many white marbles would you take out of the box so that 2/3 of the remaining marbles would be black? \n" ); document.write( "

Algebra.Com's Answer #361205 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+x+\"$ = number of white marbles to be removed
\n" ); document.write( "given:
\n" ); document.write( "2/3 of the remaining marbles are black
\n" ); document.write( "That means 1/3 must be white
\n" ); document.write( " $\"+%284+-+x%29+%2F+%288+-+x%29+=+1%2F3+\"$
\n" ); document.write( " $\"+4+-+x+=+%281%2F3%29%2A%28+8+-+x+%29+\"$
\n" ); document.write( " $\"+3%2A%28+4+-+x+%29+=+8+-+x+\"$
\n" ); document.write( " $\"+12+-+3x+=+8+-+x+\"$
\n" ); document.write( " $\"+-2x+=+-4+\"$
\n" ); document.write( " $\"+x+=+2+\"$
\n" ); document.write( "If you remove 2 white marbles, then the
\n" ); document.write( "black ones are 4/( 4 + 2 ) = 2/3 of the
\n" ); document.write( "remaining marbles \n" ); document.write( "

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