Question

7 times a certain number is decreased by 8 and the result is equals to 20​

Answer 1

7x-8=20 or x=4

Explanation:

Let's say the certain number is x

7x-8=20

Add 8 on both sides:

7x-8+8=20+8

Simplify:

7x=28

Divide 7 on both sides:

`(7x)/(7)`=
`(28)/(7)`

Simplify:

x=4

Answer 2

let x represent the number

7x-8=20

7x=20+8

7x=28

x=28/7

x=4

this is the correct answer