document.write( "Question 404583: A printer has ink that is 8% cobalt blue color and ink that is 18% cobalt blue color. How many ounces of each ink are needed to make 3 gallon (384 ounces) of ink that is 13% cobalt blue color?
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Algebra.Com's Answer #285922 by stanbon(75887)\"\" \"About 
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A printer has ink that is 8% cobalt blue color and ink that is 18% cobalt blue color. How many ounces of each ink are needed to make 3 gallon (384 ounces) of ink that is 13% cobalt blue color?
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\n" ); document.write( "Equations:
\n" ); document.write( "a + b = 384 ounces
\n" ); document.write( "0.08a + 0.18b = 0.13*384
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\n" ); document.write( "Multiply 1st by 8 and 2nd by 100 to get:
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\n" ); document.write( "8a + 8b = 8*384
\n" ); document.write( "8a + 18b = 13*384
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\n" ); document.write( "Subtract and solve for \"b\":
\n" ); document.write( "10b = 5(384)
\n" ); document.write( "b = (1/2)384
\n" ); document.write( "b = 192 ounces (amt. of 18% solution needed)
\n" ); document.write( "a = 192 Ounces (amt of 8% solution needed)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.\r
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