Question

五分之四ⅹ-20%x=40？

Answer 1

4/5ⅹ-20%x=40方程式，解法如下：

• 4/5ⅹ-20/100 x=40

• 4/5ⅹ-1/5 x=40

• 3/5ⅹ=40

• x = 40 ÷ 3/5
  

• x =  40 × 5/3

• x = 200/3

• x = 66.66666666666667

Answer 2

4/5x-20%x=40
(4/5-1/5)x=40
3/5x=40
x=40×5/3=200/3