Two separate Tanks contain 21% and 3% stock solutions.
I need to mix a combined recipe of 1Kg (1000g), my dye concentration is 100 g/Kg and requires 18% of the stock solution to work correctly. How do I calculate the amount of Stock A & B I need to weigh out for the 900 gm balance of the 1000 g after I have weighed my dye.

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