Respuesta :

mistressofdark

Answer:

-1

Explanation:

Let the number be x.

Then the equation will be:

3(x+18) = 51

=> 3x + 54 = 51

=> 3x = 51 - 54

=> 3x = -3

=> x = -3/3

=> x = -1

So, the number you thought of is -1.

SDCInfinity

Answer:

The number is 3.

Step-by-step explanation:

[tex]3(14+x)=51\\42+3x=51\\3x=9\\x=3[/tex]