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Daca 3(2-5x) = -39 , atunci x= ...

Răspuns :

3(2-5x) = -39
6-15x = -39
6+39 = 15x
15x = 45
⇒ x = 3
3(2-5x) = -39
6-15x = -39
6+39 = 15x
15x=45
x=3