SOLUTION: How much 5% acid solution should be mixed with a 45% acid solution to create one litter (or 1,000 ml) of 30% acid solution?

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Question 1147227: How much 5% acid solution should be mixed with a 45% acid solution
to create one litter (or 1,000 ml) of 30% acid solution?

Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
x of the 45%
1000-x of the 5%

45x%2B5%281000-x%29=30%2A1000
-
9x%2B%281000-x%29=6%2A1000
9x%2B1000-x=6%2A1000
8x=6%2A1000-1000
8x=5000
highlight%28x=625%29-------of 45%
and
highlight%28375%29---------of 5%