10th grade
posted by darren .
scientist needs 5L of
12% solution. She has
on 10% and 17%
solution. How much of
each does

10th grade 
TutorCat
.12(5)=.10(x)+.17(5x)
where x is the amount of 10% solution
and 5x is the rest amount of the 5L of 17% solution
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