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Aflati termenul necunoscut x din relatia:
(245:5+5 ori x):9+89=100


Răspuns :

(245:5+5×X):9+89=100
(49+5×X):9=100-89=11
(49+5×X)=11×9
49+5×X=99
5×X=99-49
5×X=50
X=50:5
X=10
(245:5+5x):9+89=100 (245:5+5x):9=100-89=11 245:5+5x=11•9=99 49+5x=99 5x=99-49 5x=50 x=50:5 x=10