$$43-14-9=20$$  $$20\div2=10$$ 
Henderson has $$9$$ sweets more than Flora. After teacher Johnny gave each of them $$7$$ more sweets, they have a total of $$43$$ sweets. How many sweets does Flora has at first? 
Options:
a) $$16$$ 
b) $$10$$ 
c) $$9$$ 
d) $$17$$ 
e) $$19$$ 