Bruno is 3x years old and his son is x years old now. Their combined age is 40 years. How old is Bru

[math_celebrity]

Bruno is 3x years old and his son is x years old now. Their combined age is 40 years. How old is Bruno

Combined age means we add, so we have:
3x + x = 40

To solve this equation for x, we type it in our search engine and we get:
x = 10

This means Bruno is:
3(10) = 30