Solving for h 7a=10-2h

First you solve for a: a=(10-2h)/7 which you then plug into "a": (10-2h)/7=10-2h
Then you multiply both sides by 7 to get ride of the 7: 10-2h= 70-14h then you add the 14h to the -2h. 10+12h= 70 then you subtract to from both sides 12h=60 then you divide both sides by 12 12h/12=60/12 which then makes h= 5 and that is your answer (the value for h is 5)