SOLUTION: How many grams of glucose and 10% glucose solution should be mixed to obtain 90g of 20% solution?

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Question 877544: How many grams of glucose and 10% glucose solution should be mixed to obtain 90g of 20% solution?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
u = grams 10% glucose
v = grams of solid dry glucose, which is obviously 100%
You are working strictly in mass.

%2810u%2B100v%29%2F90=20 and u%2Bv=90

Everything is explained and solved in this lesson:
http://www.algebra.com/tutors/Mixtures%3A-All-in-Symbols.lesson?content_action=show_dev