document.write( "Question 345424: In a chemistry class,8 liters of a 4% silver iodide solution must be mixed with a 10% solution to get a 6% solution. How many liters of the 10% solution are needed? How to solve this problem? \n" ); document.write( "

Algebra.Com's Answer #247023 by haileytucki(390) $\"\"$ $\"About$

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(salt I end up with)/(total liters of solution) = 4%
\n" ); document.write( "8 milliliters of 6% saline solution has .06*8=.48 ml salt
\n" ); document.write( "Let w = ml of water to be added
\n" ); document.write( "so....
\n" ); document.write( "(0.48)/(8+w)=0.04\r
\n" ); document.write( "\n" ); document.write( "Since the variable is in the denominator on the left-hand side of the equation, this can be solved as a ratio. For example, (A)/(B)=C is equivalent to (A)/(C)=B.
\n" ); document.write( "(0.48)/(0.04)=(w+8)\r
\n" ); document.write( "\n" ); document.write( "Since w is on the right-hand side of the equation, switch the sides so it is on the left-hand side of the equation.
\n" ); document.write( "(w+8)=(0.48)/(0.04)\r
\n" ); document.write( "\n" ); document.write( "Remove the parentheses around the expression w+8.
\n" ); document.write( "w+8=(0.48)/(0.04)\r
\n" ); document.write( "\n" ); document.write( "Reduce the expression (0.48)/(0.04) by removing a factor of from the numerator and denominator.
\n" ); document.write( "w+8=12\r
\n" ); document.write( "\n" ); document.write( "Since 8 does not contain the variable to solve for, move it to the right-hand side of the equation by subtracting 8 from both sides.
\n" ); document.write( "w=-8+12\r
\n" ); document.write( "\n" ); document.write( "Add 12 to -8 to get 4.
\n" ); document.write( "w=4 liters \n" ); document.write( "

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