Odpowiedź:
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
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Odpowiedź:
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