Odpowiedź:
[tex]6x-(3+5x)=6x-3-5x=x-3\\\\3+(8a-5)-(5a+2)=3+8a-5-5a-2=3a-4\\\\5a+3b-5-(2a-3b-5)=5a+3b-5-2a+3b+5=3a+6b\\\\2a+(3a-2b)+(a+b)=2a+3a-2b+a+b=6a-b\\\\5x+3y+(2y-4z)-(5y+6z)=5x+3y+2y-4z-5y-6z=5x-10z\\\\-2c+4-(3c+2d)-(5d-2)=-2c+4-3c-2d-5d+2=-5c-7d+6[/tex]
