Answer:
32
Explanation:
You dont know my age, let's call it x
Four times my age is then 4x.
"Reduced by" means subtraction.
200 reduced by...
means 200 -
200 - 4x = 72
Subtract 200 from both sides.
-4x = 72 - 200
-4x = -128
Divide both sides by -4.
x = 32
The unknown age is 32.