Помогите срочно!!!!!

Question

Помогите срочно!!!!!

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Answer 1

Ответ:

1. 26,9-(26,9-30)=26,9-26,9+30=30

2.11,4-(9+11,4-5)=11,4-9-11,4+5=-4

3.а+(-b+c-d)=a-b+c-d

4.6/7 - (3/7-a)=6/7-3/7+a=3/7+a

5.(x-8)-(x+8)=x-8-x-8=-16

6.5k-(k-a)=5k-k+a=4k+a

7.-7y+(x-y)=-7y+x-y=-8y+x