Using the equations and enthalpy values provided, which mathematical expression can be used to determine the unknown enthalpy change represented by x?

3c + 3o2 yields 3co2 deltah = -1182 kj

4h2 + 2o2 yields 4h2o deltah =-1144 kj

c3h8 + 5o2 yields 3co2 + 4h2o deltah = x

3h8 3c + 4h2 h = 104 kj

a. 104 = (-1182) - [x + (-1144)]

b.104 = x - [(-1182) + (-1144)]

c.104 = (-1182) + (-1144) + x

d.104 = x + (-1182) - (-1144)