Question

有甲乙两桶花生油,甲桶有45千克,从乙桶倒出20%给甲桶后,乙桶比甲桶少3千克,乙桶原有花生油多少千克?

Answer 1

A = 45

B * (100%-20%) = A + (20%)B - 3

0.8B = A + 0.2B - 3

0.6B = A - 3

0.6B = 45 - 3

B = 42 / 0.6

B = 70

乙桶原有花生油70千克

请检查,若验算得出正确的话,