Question

Трём сестрам пять лет назад вместе было 18 лет. Сколько лет будет трём сёстрам вместе через 15 лет?

Answer 1

x+y+z=18

сейчас (x+5+y+5+z+5)=18+15=33

через 15 лет

x+5+15+y+5+15+z+5+15=(x+y+z)+60=18+60=78

ответ 78 лет

Answer 2

Calculating the Age of Three Sisters

To calculate the age of the three sisters together in 15 years, we can start by determining their current combined age and then adding 15 years to it.

Given that five years ago, the three sisters' combined age was 18, we can calculate their current combined age by adding 5 to 18, which equals 23.

Now, to find their combined age in 15 years, we add 15 to 23, which equals 38 years.

Therefore, in 15 years, the three sisters together will be 38 years old.

(#source-1)