selesaikan permasalahan x + 3y 10 dan x = 2y - 5

x = 2y - 5 .......(i)
x + 3y = 10 (masukan pers. (i) ke nilai x )
2y - 5 + 3y = 10
5y = 10 + 5
5y = 15
y = 15/5
y = 3 cm

x = 2 . 3 - 5 = 6 - 5 = 1