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21fizika

1) 2х+7≥0

   2х≥-7

     х≥-3,5

2) 3-2х>0

   2x<3

     x<1,5

                   //////////////////////////

---------------[-3,5]-------(1,5)--------->x

   /////////////////////////////

x∈[-3,5; 1,5)      первый вариант.

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