500 reduced by 4 times my age is 232 .

For this case, what we want to do is determine the age of the person.

For this, we define the following variable:

x: age of the person.

We write now the equation that models the problem

Clearing x we have:

The age of the person is 67 years

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.