Răspunsuri

2014-08-28T16:46:59+03:00
(2x-3)+(6x-10)+(13-7x)=2x-3+6x-10+13-7x=x
2x+6x-7x=8x-7x=x
-3-10+13=-13+13=0
Cel mai inteligent răspuns!
2014-08-28T16:47:08+03:00