-10-(-10)=0
x-9=-1
x=-9-(-1)
x=-10
(-10)-9=_1
-2+x=4
x=4-2
X=6
-2+6=4
2+x=-1
x=2-1
x=-3
2+(-3)=-1
1. (-4)+(-6)= (-10)
(-4)-(-6)=(-10)
(-10)-(-10)=0
2.
x=9-1
x=8
8-9=-1
x=4+2
x=6
x=-1-2
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-10-(-10)=0
x-9=-1
x=-9-(-1)
x=-10
(-10)-9=_1
-2+x=4
x=4-2
X=6
-2+6=4
2+x=-1
x=2-1
x=-3
2+(-3)=-1
1. (-4)+(-6)= (-10)
(-4)-(-6)=(-10)
(-10)-(-10)=0
2.
x-9=-1
x=9-1
x=8
8-9=-1
-2+x=4
x=4+2
x=6
-2+6=4
2+x=-1
x=-1-2
x=-3
2+(-3)=-1