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[tex]3 \div (2x + 5) + 19 = 82[/tex]
Ajutatima va rog


Răspuns :

3/(2x+5)=82-19=63

impartim prin 3 ambii membri

1/(2x+5)=21

2x+5=1/21

2x=1/21-5

x=1/42-10

x=-(9si41/42)