Pozdrawiam gorąco, jak coś sie niezgadza to PW
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 = 3 - 2t - p
-(-y+2)+(-2y-4) = y - 2 - 2y - 4 = -y - 6
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b) 2x-x-4=x-4
c) 7+x-6=x+1
d) -x-4+x-5=-9
e) 1-t-p-t+2=-2t-p+3
f) y-2-2y-4=y-6
Pozdrawiam gorąco, jak coś sie niezgadza to PW
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 = 3 - 2t - p
-(-y+2)+(-2y-4) = y - 2 - 2y - 4 = -y - 6