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Carla2006
a fost răspuns

(h:5-5)x9+186:6=400:10

Răspuns :

(h:5-5)*9+186:6=400:10
(h:5-5)*9+31=40
(h:5-5)*9=40-31
(h:5-5)*9=9
(h:5-5)=9:9
h:5-5=1
h:5=1+5
h:5=6
h=6*5
h=30
proba
(30:5-5)*9+186:6=400:10
1*9+31=40
40=40
(h:5-5)×9+186:6=400:10
(h:5-5)×9+31=40
(h:5-5)×9=40-31
(h:5-5)×9=9
(h:5-5)=9:9
(h:5-5)=1
h:5=5+1
h:5=6
h=6×5
h=30