Объяснение:
N5. -3(2m+n)+(7m-n)=
=-6m-3n+7m-n=
=m-4n
N6.4x-(5x‐(1-x))=
=4x-(5x-1+x)=
=4x-5x+1-x=
=1-2x
N4.3a+5-(2a+6)+4a=
=3a+5-2a-6-4a=
=-11-3a=-11-3×(-10)=-11+30=19
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Объяснение:
N5. -3(2m+n)+(7m-n)=
=-6m-3n+7m-n=
=m-4n
N6.4x-(5x‐(1-x))=
=4x-(5x-1+x)=
=4x-5x+1-x=
=1-2x
N4.3a+5-(2a+6)+4a=
=3a+5-2a-6-4a=
=-11-3a=-11-3×(-10)=-11+30=19