document.write( "Question 795682: 7l of an acid solution was mixed with 3l of a 15% acid solution to make a 29% acid solution. What is the percent concentration of the first solution? \n" ); document.write( "
Algebra.Com's Answer #481110 by josgarithmetic(39617)\"\" \"About 
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Let h = the percent concentration for the first solution. This is your only unknown variable.\r
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\n" ); document.write( "\n" ); document.write( "L = 15% acid
\n" ); document.write( "T = 29% acid, what results
\n" ); document.write( "U = 3 liters of the 15% acid
\n" ); document.write( "V = 7 liters of the unknown h % acid\r
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\n" ); document.write( "\n" ); document.write( "\"highlight%28%28LU%2BhV%29%2F%28U%2BV%29=T%29\"\r
\n" ); document.write( "\n" ); document.write( "SOLVE FOR h.
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