document.write( "Question 215299: a mixture containing 8% salt is to be mixed with 40mL of a mixture that is 20% salt, in order to obtain a solution that is 12% salt. How much of the first solution must be used? \n" ); document.write( "
Algebra.Com's Answer #162669 by RAY100(1637)![]() ![]() ![]() You can put this solution on YOUR website! Let x = added solution \n" ); document.write( ". \n" ); document.write( ".08x + .2(40) = .12(x+40),,,,,salt balance \n" ); document.write( ". \n" ); document.write( ".08x +8 = .12x +4.8 \n" ); document.write( ". \n" ); document.write( "3.2 = .04x \n" ); document.write( ". \n" ); document.write( "80 = x,,,,,in ml \n" ); document.write( ". \n" ); document.write( "check,,,,.08(80) +.2(40)= .12(120) = 14.4 \n" ); document.write( " |