If a certain number is added to 36, The result is the same as if the numbers are multiplied by four. What is the number? please help!include all your work!!

Step-by-step explanation:

Let's say that this "certain number" is x. If we are adding that "certain number" to 36, then x+36 equals something. That "certain number," referred to as "it" in the second part, then also must be multiplied by 4 (4x) to get the same result as x+36, therefore:

x+36=4x

-x        -x

36=3x

3    3

12=x

Check yourself:

If 12 is added to 36, it equals 48.

If 12 is multiplied by 4, the result is 48 as well.

good luck!

cutie~

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm