Раскроем скобки:
-3d-6+d-13<0
-2d-19<0
-2d<19
d>19÷(-2)
d>-9,5
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Answers & Comments
Раскроем скобки:
-3d-6+d-13<0
-2d-19<0
-2d<19
d>19÷(-2)
d>-9,5