Danny gave Rose $28 less than she already had. She now has $120. that means Rosario originally had how much????
Say she had d dollars
Danny gave her d-28 more
d + d-28 = 2d-28 = 120
2d = 148
d = 74
so, she started out with $74, and Danny gave her 74-28 = $46. Now she has $120.