Answer: 90
Step-by-step explanation: think about while number as 100%. So 120 100% is 120. There are 10-10% in 100. So 12 time 10=120. So 10% of 120 is 12. So 12+12= 24 which is 20% and 5% is 6. So you get 30 dollars as your discount and subtract this from your origins 120 to get 90
