Balance the equation: C2H6 + O2 → CO2 +H2O

Balance the equation: C2H6 + O2 → CO2 +H2O (ethane + oxygen gas → carbondioxide + water)

The anwser is 2 (C2H6) + 7(O2) =4 (CO2) + 6( H2O)
left side :
C=4 , H= 12, O=14
right side :
C=4 , H= 12, O=14