One-third of a number is 12 less than the number itself

The number is 18.

Step-by-step explanation:

Given : one-third of a number is 12 less than the number itself.

To find : Find  number,

Solution : We have given a number.

Let the number =  n.

According to question :

One-third of a number = .

12 less than the number itself = n- 12 ( negative show that number is less )

So,

  = n - 12.

On multiplying both sides by 3

n = 3( n- 12).

n=  3n - 36.

On subtracting both sides by 3n

n - 3n = - 36.

-2n = -36 .

On dividing both sides by - 2

n = 18.

Therefore, the number is 18.

statement #3: proof- ang is congruent to ang ecd : angles are congruent.  

step-by-step explanation:

1: the missing angles in statement #3  

a.) acb  

reason- the reason why the answer is acb is because angle ecd and angle acb are both the same size *that's what the word congruent means this is really simple.  

2: the missing word in reason #3  

c.) vertical  

reason- the reason why the answer is vertical is because the angles in that diagram on figure 2 is slanted, which is vertical, and the e and a both lay on vertical lines. along with the other's, but e and a are the 2 main points you want to focus on. and c is kind of like your starting point, because c is for both angles, not just one.  

i hope that was and understanding.