Question

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

Answer 1

Answer:

let x represent the number

7x-8=20

7x=20+8

7x=28

x=28/7

x=4

this is the correct answer

Answer 2

Answer:

7x-8=20         or          x=4

Step-by-step 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:

$\frac{7x}{7}$=$\frac{28}{7}$

Simplify:

x=4