a)3x-(y-2x+1)=
b)(2x+3)-(-3x+9)=
c)(3x²-4x+5)-(2x²-2x+3)=
d)(3x+2y+1)-(x-3y-1)-(-3x+4y-2)=
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a)3x-y+2x-1=5x-y-1
b)2x+3+3x-9=5x-6
c)3x(2)-4x+5-2x(2)+2x-3=x(2)-2x-2
d)3x+2y+1-x+3y+1+3x-4y+2=5x+y+4
(...) potęga