Judging from the meaning of the question: (x+ 10)*7/ 12=x+2.
The solution is x=46/5.
A: A dress is worth 46/5 silver coins.
2. solution: suppose the price of this commodity is x yuan per piece.
Judging from the meaning of the problem: 0.9x-250=250* 15.2%.
The result is x=320.
The price of this commodity is 320 yuan per unit.