Question

x - Зу = 1
2x + 5y = 13​

Answer 1

{ x - 3y = 1

{ 2x + 5y = 13

x = 1 + 3y

2x + 5y = 13

x = 1 + 3y

x = 2 (1 + 3y) + 5y = 13

2 + 6y  + 5y = 13

11y = 13 - 2

11y = 11

y = 11/11

y = 1

x = 1 + 3

x = 4