Odpowiedzi

2010-02-10T20:26:05+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= -p-2t+3
f)-(-y + 2) + (-2y - 4)= y-2-2y-4= -y -6