Question

one fifth of a certain number decreased by 5 is equal to 13 what is number.​

Answer 1

Answer:

90 is the number.

Step-by-step explanation:

Let the number be x.

1/5 of x-5=13

x/5-5=13

x/5=13+5

x=18*5

x=90

Hope it helps

Answer 2

Let us take the number as 'x'.

One fifth of the number = x/5

One fifth of the number decreased by 5 is equal to 13

x/5-5 = 13

x/5 = 13+5

x/5 = 18

x = 18×5

x = 90

Therefore the number is 90.

Proof:

Substitute the value of x in x/5 = 18

90/5 = 18

18 = 18

L.H.S = R.H.S