The chemical formula for oleic acid is CH3(CH2)7CH:CH(CH2)7COOH.
The complete oxidation equation is:
aCH3(CH2)7CH = CH(CH2)7COOH + bO2 = cCO2 + dH20
Now we have to count the numbers of all the elements involved.
There are 18a carbons, 34a hydrogens, 2a+2b oxygens on the left side.
There are c carbons, 2d ...
This solution includes calculations and explanation. 190 words.