SOLUTION: A printer has ink that is 13% cobalt blue color and ink that is 17% cobalt blue color. How many ounces of each ink are needed to make 2 gallons (256 ounces) of ink that is 15% coba
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Question 760543: A printer has ink that is 13% cobalt blue color and ink that is 17% cobalt blue color. How many ounces of each ink are needed to make 2 gallons (256 ounces) of ink that is 15% cobalt blue color Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = ounces of 13% ink needed
Let = ounces of 17% ink needed = ounces of cobalt blue color in 13% ink = ounces of cobalt blue color in 17% ink
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(1)
(2)
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(2)
(2)
(2)
Multiply both sides of (1) by
and subtract (1) from (2)
(2)
(1)
and, since
(1)
(1)
(1)
128 ounces of 13% ink are needed
128 ounces of 17% ink are needed
check:
(2)
(2)
(2)
(2)
OK
