there are 84 supermarkets in the fgh chain . all of them are either in the us or canada . if there are 10 more fgh supermarkets in the us than in canada , how many fgh supermarkets are there in the us ?
"x + ( x - 10 ) = 84 - - > x = 47 . answer : d ."
divide(add(84, 10), const_2)