Bardzo proszę o rozwiązanie tych paru zadań:
Zad 24. Wykonaj działania:
a) a+(a-b)=
b) 2x-(x+4)=
c) 7-(-x+6)=
d) -(x+4)+(x-5)=
e) 1-(t+p)-(t-2)=
f) -(-y+2)+(-2y-4)=
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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 =
= -2t - p + 3
f)
-(- y + 2) + (-2y - 4) =
= y - 2 - 2y - 4 =
= -y - 6