# Barrel of oil

Barrel of oil weighs 253 kg. When it mold 43% oil, weighed 159 kg. What is the mass of the empty barrel?

Result

m =  34.395 kg

#### Solution:

m + o = 253
m + (1-43/100)*o = 159

m+o = 253
100m+57o = 15900

m = 1479/43 ≈ 34.395349
o = 9400/43 ≈ 218.604651

Calculated by our linear equations calculator.

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#### To solve this example are needed these knowledge from mathematics:

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