SOLUTION: How do I dilute from 55% nitric acid to 25% nitric acid strength using distilled water?

Question 896653: How do I dilute from 55% nitric acid to 25% nitric acid strength using distilled water?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Assuming all measures based on MASS, let x = relative amount of mass of water to add.

, assuming some 1 unit of the starting 55% nitric acid; and that x is in the same unit, but both here are ASSUMED to be MASS.
Solve for x.

Note: For promoting safety, one must add the acid to the water; NOT the water to the acid! Your question is potentially dangerous.
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