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Rezolvati in multimea numerelor naturale: a) 13+x=21 b) 51=2x+25 c)x-18=101 d)313-2x+25 Dau coronita!!!!

Răspuns :

13+x=21 x= 21-13= 8 51=2x+25 2x=51-25=26 x= 26÷2=13 x-18=101 x= 101-18=83 313-2x+25 2x= 313-25=288 x= 288÷2=144 spee ca te-am ajutat
13+x=21➡x=21-13➡x=8 51=2x+25➡2x=51-25➡2x=26➡x=26:2➡x=12 x-18=101➡x=18+101➡x=119 313-2x+25➡2x=313-25➡2x=288➡x=288:2➡x=1 44