Question

Please explain, I don't really get it

Answer 1

Because we don't know his age yet, we will substitute it for the variable x. 

So, (x/4) - 11 = 12. 

To solve, first add 11 to both sides. 

(x/4) = 23. 

Now multiply both sides by 4 to cancel out the fraction.

23 x 4 = 92.

Therefore, Uncle Wilbert is 92 years old.

Answer 2

First, let's talk about how many eggs there are in a dozen.

               1 dozen of anything = 12 of them .

Now, armed with that vital piece of information, let's do the problem.

Give Uncle Wilbert's age a name.  Call it ' A '.  (for 'age')

If you divide it by 4, you then have  A/4 .

Then if you subtract  11  from that number, you have  A/4 - 11 .

Now we can write an equation:                  A/4 - 11 = 12

Add 11 to each side of the equation:          A/4 = 23

Multiply each side of the equation by 4 :    A = 92 .

Uncle Wilbert is  92  years old.


Proof:

Divide it by 4 and you have  23 .

Then subtract  11  and you have  12  ... the number of eggs in a dozen.