Question

淘气原有75枚邮票,奇思原有121枚邮票.现在淘气要给奇思多少枚邮票,才能使奇思的邮票枚数是淘气

票枚数的3倍呢

Answer 1

解：设淘气要给奇思x枚邮票，才余隐族能竖弊使奇思的邮票枚数是淘气邮票枚数的3倍，
121+x=（75-x）×3
121+x=225-3x
x+3x=225-121
4x=104
x=104÷4
x=26
答：淘气要给奇思26枚邮票，才能使奇思的邮携衡票枚数是淘气邮票枚数的3倍。

Answer 2

Set x as the number of stamps that Taoqi will give Qisi.
Refer to the question.
3*(75 - x) = 121 + x
So the value of x is 26 which is the answer of this question.