brittanniaf2 brittanniaf2

11-08-2021
Chemistry

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A number is three times the difference between twenty and the number. What is the number?

Respuesta :

ziembernice1 ziembernice1

11-08-2021

Answer:

the number is 7

Explanation:

"Three times" means multiply by 3

"Difference" means subtract

"Sum" means add

3(x - 7) = 23 - (3x + 2)

3x - 21 = 23 - 3x - 2

3x - 21 = 21 - 3x

6x = 42

x = 7

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