August 2021 0 9 Report
Помогите решить срочно!!! Докажите тождество:
1)-0,2(4b-9)+1,4=0,6b+1,8

2)(5a-3b)-(4+5a-3b)=-4

3)5(0,4x-0,3)+(0,8-0,6x)=1,4x-0,7

4)1/9(3y-27)-2(1/12y-1,5)=1/6y
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