document.write( "Question 539670: A chemist has a beaker of a 3% acid solution and a beaker of a 7% acid solution.He needs to make 75mL of a 4% acid solution.With the information given,write a system of linear equations and solve the system. \n" ); document.write( "
Algebra.Com's Answer #353506 by stanbon(75887)\"\" \"About 
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A chemist has a beaker of a 3% acid solution and a beaker of a 7% acid solution.He needs to make 75mL of a 4% acid solution.
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\n" ); document.write( "Quantity: t + s = 75
\n" ); document.write( "Acid:::: 3t +7s = 4*75
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\n" ); document.write( "Multiply thru the Quantity equation by 3 to get:
\n" ); document.write( "3t + 3s = 75
\n" ); document.write( "3t + 7s = 4*75
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\n" ); document.write( "Subtract and solve for \"s\":
\n" ); document.write( "4s = 3*75
\n" ); document.write( "s = 56.25 oz (amt. of 7% solution needed)
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\n" ); document.write( "Solve for \"t\":
\n" ); document.write( "t + 56.25 = 75
\n" ); document.write( "t = 18.75 oz (amt. of 3% solution needed)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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