SOLUTION: A printer has ink that is 4% cobalt blue color and ink that is 26% cobalt blue color. How many ounces of each ink are needed to make 3 gallons (384 ounces) of ink that is 15% cobal

Question 1125686: A printer has ink that is 4% cobalt blue color and ink that is 26% cobalt blue color. How many ounces of each ink are needed to make 3 gallons (384 ounces) of ink that is 15% cobalt blue color?
Found 2 solutions by FrankM, josgarithmetic:
Answer by FrankM(1040) (Show Source): You can put this solution on YOUR website!
Let 4% solution be L (gal) (For 'light' color)
Let 26% solution be D (gal) (For 'dark' color)
.04 L + .26 D = .45 (because 15% of 3 gal is .45 gal of 'color'.
and
L + D = 3
Multiply 1st eq by 100
4 L +26 D = 45
Mult 2nd eq by 4
4L + 4D = 12
subtract, and 22D = 33 D=1.5 and L = 1.5
Note, that since 15 = (4+26) /2 , I knew that the mix would be equal parts of each. The solution provides the full steps for any mixure problem worded this way.
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
https://www.algebra.com/my/Mixtures%3A-All-in-Symbols.lesson?content_action=show_dev
https://www.algebra.com/my/Mixtures%3A-All-in-Symbols.lesson?content_action=show_dev
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