Решите систему x-y=4 y/2=x/5

Question

Решите систему
x-y=4
y/2=x/5

Answer 1

X = y + 4
y/2 = y+4/5 

5y = 2(y + 4)
5y - 2y = 8 
3y = 8
y = 8/3 = 2 2/3 

x = 2 2/3 + 4 = 6 + 2/3 

Ответ:
(2 2/3 ; 6 2/3)