Упростить выражения

1) 4m-6m-3m+7+m=

2)6+4a-5a+a-7a

3)3n-8n-5n+2+2n

4)8+7k-3k+k-11k

Раскрыть скобки и привести подобные слагаемые

1) -8(k-3)+4(-2)-2(3k+1)=

2)5(n-2)-6(n+3)-3(2n-9)=

3)-3(a-2)+6(a-4)-4(3a+2)=

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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