A wise man once said, "400 reduced by 3 times my age is 151." What is his age?

1 Answer
May 3, 2018

The wise man is 83 years old.

Explanation:

Let's assume his age is x then,

Note: Blue means additions or substractions to both sides.

400 - 3x = 151

400 color(blue)( - 151) - 3x = 151 color(blue)(- 151)

249 - 3x = 0

249 - 3x + color(blue)(3x) = 0 + color(blue)(3x)

249 = 3x

249/color(blue)3 = (3x)/color(blue)3

83 = x