This year, three times of Xiaogang's age is equal to five times of Xiaofang's age. Ten years later, if four times of Xiaogang's age is equal to five times of Xiaofang's age, Xiaogang's age this year will be five times______ I'm 40 years old

This year, three times of Xiaogang's age is equal to five times of Xiaofang's age. Ten years later, if four times of Xiaogang's age is equal to five times of Xiaofang's age, Xiaogang's age this year will be five times______ I'm 40 years old

Let Xiaogang be x years old, then Xiaofang is 35x years old. According to the meaning of the question, we can get the equation: 4 (x + 10) = 5 (35x + 10), & nbsp; & nbsp; & nbsp; 4x + 40 = 3x + 50, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 10; a: Xiaogang is 10 years old this year, so the answer is: 10