Zastąp "X "odpowiednią liczbą. a) 5-x=3 x-7=7 x-7=7 5-x=-3 c) x-7=-2 20-x=29 5-x=7 x-7=0 b) -9-x=10 5-x=0 x-7=-10 x-(-7)=-2
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a) 5-2=3
14-7=7
5-8=-3
5-7=-2
20-(-9)=29
5-(-2)=7
7-7=0
-9-(-1)=10
5-5=0
-3-7=-10
-9-(-7)=-2
a) 5-2=3 0-7=7 to samo? 5-8=-3
c?) 5-7=-2 20-(-9)=29 5-(-2)=7
b)-9-(19)=10 5-5=0 -3-7=-10 -9-(-7)=-2