Odpowiedzi

2010-02-09T18:43:40+01:00
A)a+(a-b)= a+a-b = 2a +b
b)2x-(x+4)= 2x -x -4 = x-4
c)7-(-x+6)= 7+x-6 = x +1
d)-(x+4)+(x-5)= -x-4+x-5 = -9
e)1-(t+p)-(t-2)= 1 -t-p-t+2 = 3-2t-p
f)-(-y+2)+(-2y-4)= y-2-2y-4 = -y -6
2010-02-09T18:45:45+01:00
A)2a-b
b)x-4
c)1+x
d)-9
e)-2t-p+3
f)-y-6