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92-(x+30:5)=37 72-3×b=18


Răspuns :

Se rezolva prin metoda balantei
92-(x+6)=37 69×b=18
x+6=37+92
x+6=129
x=129-6
x=123

b=69:18
b=3.8(3)

SPER CA TE.AM AJUTAT