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b)3,5a -(12a-4b-b) = 3,5a -12a+4b+b= -8,5 a +5b
c)25x -(4x+18y-9) = 25x-4x-18y+9= 21x-18y+9
d)(32x-22y+45) -6x=32x-22y+45-6x =45-22y+26x
e)(3a-2) -(24a-7) =3a -2 -24a+7 =-21a +5
f)(24x-y+35) -(6x-12) = 24x-y+35 -6x+12= -y+47+18x
g)-(27a-31) -(5a+2)-19 = -27a +31 -5a-2 -19= -32a+10
h)(54x-30) - (11x-25) -(22x-9) = 54x-30-11x+25-22x+9=21x+4