mam problem z jednym przykładem : x-(-7)=-2
x-(-7)= -2
x+7= -2x= -2-7x= -9
x-(-7)=-2
x+7=-2x=-2-7x=-9
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x-(-7)= -2
x+7= -2
x= -2-7
x= -9
x-(-7)=-2
x+7=-2
x=-2-7
x=-9