Barrel of oil

Barrel of oil weighs 282 kg. When it mold 56% oil, weighed 138 kg. What is the mass of the empty barrel?


m =  24.9 kg


m + o = 282
m + (1-56/100)*o = 138

m+o = 282
100m+44o = 13800

m = 174/7 ≈ 24.857143
o = 1800/7 ≈ 257.142857

Calculated by our linear equations calculator.

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