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afla numarul necunoscut:
60-10:(37-4xa)=50


Răspuns :

60-10:(37-4a)=50

60-50=10:(37-4a)
10=
10:(37-4a)
37-4a=10:10
37-4a=1
4a=37-1
4a=36
a=36:4
a=9