Question

four - fifth of a number is 20 less than the original number. find the number​

Answer 1

Answer:

x=100

Step-by-step explanation:

let the number be x

x - 20=4/5x

x-4/5x=20

x/5=20

x=20*5

x=100

Answer 2

Answer:

Step-by-step explanation:

Let the number be = x

Now,

4/5x - 20 = x

4x+100/5 = x

4x + 100 = 5x

5x - 4x = 100

1x = 100

x = 100                                                                             [∵$\frac{4}{5}x - 20 = x\\\frac{4x+100}{5} = x\\4x+100 = 5x\\5x-4x = 100\\1x = 100\\x = 100$ 1x = x]

Hope this helps you