tolongya yang dilingkari warna merah

x+2y = 5 x 2
2x-y = 5 x1

2x+4y=10
2x-y = 5
--------------------- -
5y = 5
y =1

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

1/3+1/1 =4/3 = 1 1/3