wykonaj zadanie ze zdiecia

a+(a+b)=a+a-b=2a-b 2x-(x+4)=2x-x-4=x-4 7-(-x+6)=7+x-6=x+1 -(x+4)+(x-5)=-x-4+x-5=-9 1-(t+p)-(t-2)=1-t-p-t+2=-2t-p+3 -(-y+2)+(-2y-4)=y+2-2y-4=-y-6