Barrel 3

Barrel with water weights 118 kg. When we get off 75% of water, it weighs 35 kg. How many kg has an empty barrel?

Correct answer:

x =  7.33 kg

Step-by-step explanation:

m1=118 kg r=100%75%=110075=0.25 m2=35 kg  x+y=m1 x+r y=m2 x+y=118 x+0.25 y=35  x+y=118 x+0.25y=35  Row2Row1Row2 x+y=118 0.75y=83  y=0.7583=110.66666667 x=118y=118110.66666667=7.33333333=7.33 kg  x=3227.333333 y=3332110.666667

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