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Cum se rezolvă ecuatia [(x-28×2)×3+5]×12=1664

Răspuns :

[(x-56)×3+5]×12=1664
(3x-168+5)×12=1664
(3x-163)×12=1664
36x-1956=1664/+1956
36x=3620
x=100,(5)