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# Twenty less than four times a certain number is 4. Determine the number.?

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- RRLv 71 year agoFavorite Answer
Twenty less

-20

than four times a certain number

4x

is

= 4.

4x - 20 = 4

4x = 24

x = 6

Alternatively, work it backwards:

Starting with 4, working backwards twenty less = twenty more

20 + 4 = 24

If four times a number = 24, the answer must be 6.

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- Anonymous1 year ago
Let the number be x

4 x - 20 = 4

4 x = 24

x = 6

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- 1 year ago
You can just trial and error, I first tried 4 which would get -4, then I tried 5 which would get you 0, then I got six as 4!

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- Mike GLv 71 year ago
x-5 = 1

x = 6

- geezerLv 71 year agoReport
But you need to explain how you started at x-5 = 1

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- 冷眼旁觀Lv 71 year ago
Let x be the number.

4x - 20 = 4

4x = 24

x = 6

The number is 6.

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