salam peyman jan bara hallesh bayad begam aval az 2 tarafe ebarate X1 + [x1] = X2+ [x2] beraket gerefte ta be [x1] +[x1] = [x2] +[x2] beresim baad az farz estefade karde kemige Fx = X + [x] dar natije Fx -X =[x] khob dar formule bala ja gozari mikonim ke mishe Fx1 - X1...