Rozwiążcie ;-) 7x + 14y= -35 -5x + 5y = -32

7x + 14y= -35 / :7 -5x + 5y = -32 / ×(-1) x + 2y= -35 5x - 5y = 32 x= -35 - 2y 5 × (-35 -2y) = 32 x= -35 -2y -175 -2y = 32 x=-35 -2y -2y =32 +175 x= -35 -2y -2y= 207 / : (-2) x= -35 -2y y= -103,5 x= -35 - 2× (-103,5) y= -103,5 x= -242 y= -103,5

7x + 14y= -35 wyznaczamy x -5x + 5y = -32 7x = - 35 - 14y x = -(35 + 14y)/7 5(35 + 14y)/7 + 5y = - 32 5(35 + 14y) + 35y = - 224 175 + 70y + 35y = - 224 105y = - 224 - 175 105y = - 399 y = - 399/105 7x + 14y = - 35 7x - 14( - 399/105) = - 35 7x + 5586/105 = - 35 735x + 5586 = - 3675 735x = - 3675 - 5586 7x = - 9261 x = - 9261/7 = - 1323 y = - 399/105 = - 3,8