document.write( "Question 886657: Dear tutor I really need ur help I newly moved to US and did not learn some topics and need help asap and would be so thankful for ur help. Here is my question 11ml of a saline solution was mixed with 4ml of a 55% saline solution to make a 77% saline solution. Find the percent concentration of the first solution. \n" ); document.write( "
Algebra.Com's Answer #536031 by ankor@dixie-net.com(22740)\"\" \"About 
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11ml of a saline solution was mixed with 4ml of a 55% saline solution to make a 77% saline solution.
\n" ); document.write( " Find the percent concentration of the first solution.
\n" ); document.write( ":
\n" ); document.write( "Let x = the percent concentration in decimal form
\n" ); document.write( "We know the resulting amt is 11 + 4 = 15 ml
\n" ); document.write( ":
\n" ); document.write( "11x + .55(4) = .77(15)
\n" ); document.write( "11x + 2.2 + = 11.55
\n" ); document.write( "11x = 11.55 - 2.2
\n" ); document.write( "11x = 9.35
\n" ); document.write( "x = 9.35/11
\n" ); document.write( "x = .85
\n" ); document.write( ":
\n" ); document.write( "the first solution was an 85% solution
\n" ); document.write( ":
\n" ); document.write( ";
\n" ); document.write( "Check this
\n" ); document.write( ".85(11) + .55(4) = .77(15) \n" ); document.write( "
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