Oblicz
a) (3x - 6z): (-3)=
b) (12 - 13 ab):a=
c) (15 - 18 ):(-6 ) =
d) (12x - 18y +9):(-3)+(-20x+15y - 25):5=
prosze pomoc :)
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a) -x+2z
b) 12a-13b
c) -2.5x+3x^2
d) -4x+6y-3-4x+3y-5=-8x+9y-8