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faceti ex39 subpunctul c

Faceti Ex39 Subpunctul C class=

Răspuns :

30x-13   unde 30x=13, deci x=13/30

25x+12 25x=-12 deci x=12/-25

2x+4x+6x+8x+10x-13 < x+3x+5x+7x+9x+12

30x-13 < 25x+12

30x-25x < 12+13

5x < 25

x < 5