1/2x+3/4y=5/4 x-y=1

1/2x + 3/4y = 5/4
-------------------------- x 4
2x + 3y =5

x - y = 1
x = y+1

Substitusi
2x + 3y = 5
2(y + 1) + 3y = 5
2y + 2 + 3y = 5
5y + 2 = 5
5y = 5 - 2
5y = 3
y = 3/5

x = y + 1
x = 3/5 + 1
x = 3/5 + 5/5
x = 8/5