document.write( "Question 432501: How many liters of pure baking soda must be added to 180 liters of a 40% baking soda solution to get a 70% baking soda solution? \n" ); document.write( "

Algebra.Com's Answer #299891 by josmiceli(19441) $\"\"$ $\"About$

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In words:
\n" ); document.write( "(liters of pure baking soda in final solution)/(liters of final solution) = 70%
\n" ); document.write( "Let $\"x\"$ = liters of pure baking soda to be added
\n" ); document.write( "given:
\n" ); document.write( "Pure baking soda in 40% solution is $\"+.4%2A180+=+72+\"$
\n" ); document.write( "-----------------
\n" ); document.write( " $\"+%28x+%2B+72%29%2F%28x+%2B+180%29+=+.7+\"$
\n" ); document.write( " $\"+x+%2B+72+=+.7%2A%28x+%2B+180%29+\"$
\n" ); document.write( " $\"+x+%2B+72+=+.7x+%2B+126+\"$
\n" ); document.write( " $\"+.3x+=+54+\"$
\n" ); document.write( " $\"+x+=+180+\"$
\n" ); document.write( "180 liters of pure baking soda must be added
\n" ); document.write( "check:
\n" ); document.write( " $\"+%28x+%2B+72%29%2F%28x+%2B+180%29+=+.7+\"$
\n" ); document.write( " $\"+%28180+%2B+72%29%2F%28180+%2B+180%29+=+.7+\"$
\n" ); document.write( " $\"+252+%2F+360+=+.7+\"$
\n" ); document.write( " $\"+.7+=+.7+\"$
\n" ); document.write( "OK \n" ); document.write( "

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