Unit of transformation 1 There are two barrels of oil. It is known that 4 / 9 of a is equal to 3 / 7 of B. A is 5kg less than B. how many kg does a and B have? There are two barrels of oil of 275 kg, 5 / 9 of a is poured out, and 4 / 7 of B is poured out. The remaining two barrels of oil are exactly the same?

Unit of transformation 1 There are two barrels of oil. It is known that 4 / 9 of a is equal to 3 / 7 of B. A is 5kg less than B. how many kg does a and B have? There are two barrels of oil of 275 kg, 5 / 9 of a is poured out, and 4 / 7 of B is poured out. The remaining two barrels of oil are exactly the same?

A: B = 9 / 4:7 / 3 = 27:28
A = 27 * 5 = 135 kg
B = 28 * 5 = 140 kg
Let a have x kg and B 275-x kg
X*(1-5/9)=（275-X）*（1-4/7）
4X/9=825/7-3X/7
55X/63=825/7
X=135
275-135=140
A and B used to be 135 kg and 140 kg