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cum se rezolva acest ex: (18×b-1278):149=36

Răspuns :

rezolvare:
18b-1278=36x149
18b-1278=5364
18b=5364+1278
18b=6642
b=369
(18xb-1278):149=36
(18xb-1278)=36x149
(18xb-1278)=5364
(18xb)=5364+1278
(18xb)=6642
b=6642:18
b=369
proba
(18x369-1278):149=36