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muntas
@muntas
July 2022
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8/9×(-2.7b+2,5)-2/3×(1/3-1.2b)=-2 помогите решить
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Igornatev
8/9×(-2,7b)=8/9×(-2 7/10b)=8/9×(-27/10b)= -12/5b
8/9×2,5=8/9×2 1/2=8/9×5/4=10/9
-12/5b+10/9
---------
-2/3×1/3= -2/9
-2/3×(-1,2b)=2/3×1 1/5b=2/3×6/5b=4/5b
-2/9+4/5b
----------
-12/5b+10/9-2/9+4/5b= -2
-8/5b= -2-8/9
b= -26/9×(-5/8)
b=65/36
b= 1 29/36
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Answers & Comments
8/9×2,5=8/9×2 1/2=8/9×5/4=10/9
-12/5b+10/9
---------
-2/3×1/3= -2/9
-2/3×(-1,2b)=2/3×1 1/5b=2/3×6/5b=4/5b
-2/9+4/5b
----------
-12/5b+10/9-2/9+4/5b= -2
-8/5b= -2-8/9
b= -26/9×(-5/8)
b=65/36
b= 1 29/36