-3 (6a-7b+1)=
1 punkt
-18a+21b-3
-18a-21b+3
-18a-7b+1
-18a-21b-3
4x (2x +4y-5)=
1 punkt
8x+4y-5
8x2 + 16xy - 20x
6x +8y - 5
8x +16xy - 20x = 16xy -12x
2(3x+4y-7)=
1 punkt
6x+4y-7
6x+8y-7
6x+8y-14
6x+8y+14
5 (x + 5y - 4a) - 4 (x - 5y +5a) =
1 punkt
x +45y - 40a
9x - 5y
9x + 5y
x + 45y
5 (x +5y -4a) + 4 (x -5y +5a) =
1 punkt
9x + 5y +40a
x +45y -40a
9x - 5y
9x +5y
(6x + 12y - 18z) :6=
1 punkt
6x + 12y - 3z
6x + 6y - 12z
x + 2y - 3z
5x + 6y - 12z