Distilled water

Seawater contains 5% salt. How much distilled water should be poured into 40 kg of seawater so that the salt content is 2%? How many kilograms of 2% of seawater do we get?

Correct answer:

x =  60
y =  100

Step-by-step explanation:

40·0.05=y·0.02
y = x+40

0.02y = 2
x-y = -40

Pivot: Row 1 ↔ Row 2
x-y = -40
0.02y = 2


y = 2/0.02 = 100
x = -40+y = -40+100 = 60

x = 60
y = 100

Our linear equations calculator calculates it.

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