Объяснение:
-2(6,7b-0,5)+5,3b-2=
= - 13,4b+1+5,3b-2=
= - 8,1b-1= - 8,1×2/9-1= - 8 1/10×2/9-1=
= - 81/10×2/9-1= - 9/5-1= - 1,8-1= - 2,8
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Answers & Comments
Объяснение:
-2(6,7b-0,5)+5,3b-2=
= - 13,4b+1+5,3b-2=
= - 8,1b-1= - 8,1×2/9-1= - 8 1/10×2/9-1=
= - 81/10×2/9-1= - 9/5-1= - 1,8-1= - 2,8