Water wessel

The vessel containing water weighs 19 kg. After pouring half the water, its weighed 11 kg. What is the weight of the empty vessel?

Correct answer:

x =  3 kg

Step-by-step explanation:


x+y=19
x+y/2=11

x+y = 19
2x+y = 22

Pivot: Row 1 ↔ Row 2
2x+y = 22
x+y = 19

Row 2 - 1/2 · Row 1 → Row 2
2x+y = 22
0.5y = 8


y = 8/0.5 = 16
x = 22-y/2 = 22-16/2 = 3

x = 3
y = 16

Our linear equations calculator calculates it.



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