Respuesta :

AprilKitties
So first we want to assign the certain number a variable, let's say x.

So we can write this out as an equation, or:

7x + 12 = 47

Now we can just solve this.

7x + 12 - 12 = 47 - 12

7x = 35

/7     /7

x = 5

So the certain number is 5.
5 beacause 5 times 7 is 35 and 35 plus 12 is 47.

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