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Determină nr.necunoscut din expresia:(256:a+364):5×6-344=400

Răspuns :

(256:a+364):5x6=400+344
(256:a+364):5x6=744
(256:a+364):5=744:6
(256:a+364):5=124
256:a+364=124x5
256:a+364=620
256:a=620-364
256:a=256
a=256:256
a=1