Rui Baldwin

2021-08-17

A cook needs 30 liters of water with 25% salt in them. He has water with 10% and water with 30% salt. How much of each should he mix to get what he needs?

sweererlirumeX

Skilled2021-08-18Added 91 answers

Let the amount of the 10% water be x. Then the amount of the 30% water is 30-x.

0.10(x)+0.30(30-x)=0.25(30)

0.10x+9-0.30x=7.5

-0.20x=7.5-9

$x=\frac{-1.5}{-0.20}$

x=7.5

30-7.5=22.5

The cook needs 7.5 liters of the 10% water and 22.5 liters of the 30% water.

0.10(x)+0.30(30-x)=0.25(30)

0.10x+9-0.30x=7.5

-0.20x=7.5-9

x=7.5

30-7.5=22.5

The cook needs 7.5 liters of the 10% water and 22.5 liters of the 30% water.

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