math word problem

Question

Pinchas is twice as old as his brother Jacob. In 10 years, the sum of their ages will be 50. How old is Pinchas now?

Answer 1

P= 2J

P+10 + J+10 = 50

P +J = 30

2J + J = 30

3J = 30

J= 30/3 = 10 years old

P = 2(10 = 20 years old

In ten years they'll be 20 and 30, which sum to 50