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b) 15 + 7x -2(x - 5) = 6(2x + 5) - 26​

Răspuns :

Răspuns:

b) 15 + 7x -2(x - 5) = 6(2x + 5) - 26

15+7x-2x+10=12x+30-26

25-4=12x-5x

7x=21=>x=21:7=>x=3