this is correct because if you give the $20 to them and the toy costs $14 then you subtract that from the amount you gave them then whatever is left is how much you get back.
B= 2000 + CD 98000 = B + CD substitute b in 98000 = 2000 + CD + CD add variables 98000 = 2000 + 2CD subtract 2000 from each side 96000 = 2CD divide each side by 2 48000 = CD
