SOLUTION: At a local "paint swap", Kari found large supplies of Skylite Pink (12.5% red pigment) and MacIntosh Red (20% red pigment). How many gallons of each color will Kari need to pick up

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Question 843594: At a local "paint swap", Kari found large supplies of Skylite Pink (12.5% red pigment) and MacIntosh Red (20% red pigment). How many gallons of each color will Kari need to pick up in order to mix 3 gallons of Summer Rose (17% red pigment)?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
.2a+.125b=.17(3),
a+b=3
a=1.8, b=1.2
2 of each but only needs to use a=1.8, b=1.2