Tolong dibantu yaa,sertakan caranya

CH4 + 2O2 ---->>> CO2 + 2H2O
x ...........................x
C4H10 + 13/2O2 ---->>> 4CO2 + 5H2O
5-x.................................20-4x

V CO2 = x + 20 - 4x
17 = 20 - 3x
3 = 3x
x = 1 L

V metana = 1 L
V butana = 4 L
jawaban C