小学五年级数学(分数)的计算过程!
设分子为x,则有:
(x-6)/(168-x-6)= 5/7;
162×5-5x = 7x-42;
12x = 810+42;
12x = 852;
x = 71;
所以分母= 168-71 = 97;
分数是71/97;
(x-6)/(168-x-6)= 5/7;
162×5-5x = 7x-42;
12x = 810+42;
12x = 852;
x = 71;
所以分母= 168-71 = 97;
分数是71/97;