zapisz w prostszej postaci    3x+4x       6x-x      -8+5x      x-4x     4*7y    12y :6     ( -8y )* 1/2    10a :(-2)

3x+4x=7x 6x-x=5x -8x+5x=3x x-4x=-3x 4*7y=28y 12y :6=2y ( -8y )* 1/2 =-4y 10a :(-2)=-5a

3x + 4x = 7x 6x - x = 5x -8 + 5x = 5x - 8 x - 4x = -3x 4*7y = 28y 12y : 6 = 2y (-8y)*1/2 = -4y 10a : (-2) = -5a