Teo is ten years older than Ale. In four years, the sum their age will be 82. How old is Ale today?

32 years old

Step-by-step explanation:

Let Ale's age be x years old today.

Theo's age = x+10

In 4 years,

Ale's age = x+4

Theo's age = x+10+4 = x+14

Sum of their age = 82

x+4 + x+14 = 82

2x + 18 = 82 (Simplify)

2x = 82 - 18 (bring constant to 1 side)

2x = 64 (simplify)

x = 64 : 2

x = 32

Thus, Ale is 32 years old today.