A wise man once said, "400 reduced by 3 times my age is 163." What is his age?

If his age is a

400 reduced by 3 times my age is 163 means

400-3a=163

minus 300 from both sides

-3a=-237

divide both sides by - 3

a=79

his age was 79 at the time of the quote

Let the man's age be x.

400 - 3x = 163

First, simplify both sides of the equation.

400 + - 3x = 163

-3x + 400 = 163

Npw, subtract 400 from both sides.

-3x + 400 - 400 = 163 - 400

-3x = - 237

Finally, divide both sides by - 3.

-3x / - 3 = - 237 / - 3

x = 79

The man's age is 79 years old.