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rezolvati ecuatia{[(x+2)÷3]×4}÷5=100

Răspuns :

[(x+2):3] x4 =100:5
[(x+2):3]x4 =20
(x+2):3 =20:4
(x+2) :3=5
x+2= 5x3
x+2=15
x=15-2
x=13