document.write( "Question 786193: if a chemist uses 77 milliliters of water, how many milliliters of reagent will she need to make 30% solution? \n" ); document.write( "

Algebra.Com's Answer #477835 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+x+\"$ = ml of reagent
\n" ); document.write( " $\"+x+%2F+%28+77+%2B+x+%29+=+.3+\"$
\n" ); document.write( " $\"+x+=+.3%2A%28+77+%2B+x+%29+\"$
\n" ); document.write( " $\"+x+=+23.1+%2B+.3x+\"$
\n" ); document.write( " $\"+.7x+=+23.1+\"$
\n" ); document.write( " $\"+x+=+33+\"$
\n" ); document.write( "33 ml of reagent are needed
\n" ); document.write( " \n" ); document.write( "

\n" );