1. The pants are 25% off so they would be 75% of the original cost so 0.75S would be the sale price. Multiply that by 4 for 4 pairs = 3s
2. she read 2 times more so 2b, then 3 more than that so 2b+3, now add what he read to get 4b +3
3. Add the tv's and computers together than multiply by the percentage: 0.03(p+c)
4. 6.25% becomes 0.0625, so 1 box of paper would be 1.0625p, now multiply that by 3 for 3 boxes to get 3.1875p