Odpowiedzi

2010-04-07T21:35:09+02:00
B) -5x+(2y+4x)-(7x-8y)-x+(2-6y)=-5x+2y+4x-7x+8y-x+2-6y=-9x+4y+2
c)-9z-(4-3z)-8y-(-7z+8y)+(-2y-7)= -9z-4+3z-8y+7z-8y-2y-7=-18y+z-11
2010-04-07T21:35:13+02:00
B) -5x+(2y+4x)-(7x-8y)-x+(2-6y)=-5x+2y+4x-7x+8y-x+2-6y= -9x+4y +2

c)-9z-(4-3z)-8y-(-7z+8y)+(-2y-7)=-9z-4+3z-8y+7z-8y-2y-7= z-11-18y

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