有甲、乙两筐苹果,如果从甲筐取12个放入乙筐,则甲筐苹果个数是乙筐的1.2倍,已知甲筐原来比乙筐多50个苹

题目

有甲、乙两筐苹果,如果从甲筐取12个放入乙筐,则甲筐苹果个数是乙筐的1.2倍,已知甲筐原来比乙筐多50个苹
甲筐原来有苹果多少个?

答案

设甲X个,乙X-50个
X-12 = 1.2*(X-50+12)
X-12 = 1.2*(X-38)
X-12 = 1.2X-45.6
45.6-12 = 1.2X-X
33.6 = 0.2X
0.2X = 33.6
X = 33.6/0.2
X = 168
甲有168个