Question

Thrice a number when decreased by 4 gives 20. Then the number is ​

Answer 1

Answer:

Let the number be x.

twice =2x

When it is decreased by 7 we get the following equation:

2x−7=45

⇒2x=45+7

⇒2x=52

⇒x=

2

52

∴x=26

The number is 26.

Answer 2

Answer:

I think the number is X

so thrice of the number is X × 3= 3X

So,

3X – 4= 20

Or 3X=20+4

Or 3X =24

Or X = 24/3

Or X = 8

Then the number is 8

that means when you thrice this number, this is 8×3= 24 and when you decrease 4 it is 20!