
William W. answered 09/14/20
Math and science made easy - learn from a retired engineer
Let x be your age. The twice your age is 2x and twice your age reduced by 3 is 2x - 3.
So:
2x - 3 = 9 [add 3 to both sides of the equation to get:
2x = 12 [divide both sides by 2 to get:
x = 6
So, you are 6 years old.