Question

甲数是六分之七,币乙数的四倍少六分之五求乙数

Answer 1

设乙数是 x .

4 x - 5 / 6 = 7 / 6

4 x = 7 / 6 + 5 / 6

4 x = 2

x = 1 / 2

答：乙数为 1 / 2