Answer: $10 dollars for a small jersey
Step-by-step explanation: distrubute 5 to (x+1) then distrubute 7 to (x+3) to get 5x+5+7x+21=146, add x values and non x values to get 12x+26=146, then subtract 26 from both sides to get 12x=120, divide 120 by 12 to get x=10