document.write( "Question 769098: the proportion of black paint to pink paint is 2:7. how much black paint is used if 21 liters of pink paint is used? \n" ); document.write( "
Algebra.Com's Answer #468720 by Cromlix(4381)\"\" \"About 
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Black paint to Pink paint
\n" ); document.write( "2:7
\n" ); document.write( "21 litres of pink paint
\n" ); document.write( "21/7 = 3
\n" ); document.write( "So, 3*2 = 6 litres of black paint.
\n" ); document.write( "Hope this helps.
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