document.write( "Question 809240: Mari mixes 16 liters of 18% solution with 27% acid solution to make 21% acid solution. Let x represent the number of liters of 27% solution used. Which equation can be used to find the number of liters of 27% acid solution in the mixture solution?
\n" ); document.write( "A) 2.88+.21x=.27(x+16)
\n" ); document.write( "B) 2.88+.27x=.21(x+16)
\n" ); document.write( "C) 4.32+.21x=.27(x+16)
\n" ); document.write( "D) 3.36+.27x=.18(x+16) \n" ); document.write( "

Algebra.Com's Answer #487458 by josgarithmetic(39617) $\"\"$ $\"About$

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(amount of pure acid)/(amount of solution or mixture resulting)=(concentration of acid in solution or mixture)\r
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\n" ); document.write( "\n" ); document.write( "Let x = amount of the 27 % acid to use.\r
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\n" ); document.write( "\n" ); document.write( " $\"%2816%2A18%2Bx%2A27%29%2F%28x%2B16%29=21\"$ , or according to the way the choices are presented,
\n" ); document.write( " $\"%2816%2A%280.18%29%2Bx%280.27%29%29%2F%28x%2B16%29=0.21\"$ \n" ); document.write( "

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