His father's age is 9 times that of XiaoCong, and his mother's age is 7.5 times that of XiaoCong. His father is 6 years older than his mother, and XiaoCong is a child this year______ I'm 40 years old

Suppose XiaoCong is x years old, then: 9x-7.5x = 6, & nbsp; & nbsp; 1.5x = 6, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 4; a: XiaoCong is 4 years old, so the answer is: 4

His father's age is 9 times that of XiaoCong, and his mother's age is 7.5 times that of XiaoCong. His father is 6 years older than his mother, and XiaoCong is a child this year______ I'm 40 years old

Suppose XiaoCong is x years old, then: 9x-7.5x = 6, & nbsp; & nbsp; 1.5x = 6, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 4; a: XiaoCong is 4 years old, so the answer is: 4

His father's age is 9 times that of XiaoCong, and his mother's age is 7.5 times that of XiaoCong. His father is 6 years older than his mother, and XiaoCong is a child this year______ I'm 40 years old

Suppose XiaoCong is x years old, then: 9x-7.5x = 6, & nbsp; & nbsp; 1.5x = 6, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 4; a: XiaoCong is 4 years old, so the answer is: 4

His father's age is 9 times that of XiaoCong, and his mother's age is 7.5 times that of XiaoCong. His father is 6 years older than his mother, and XiaoCong is a child this year______ I'm 40 years old