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a fost răspuns

(h:5-5)×9+186:6=400:10

Răspuns :

(h:5-5)x9+31=40
(h:5-5)x9=40-31=9
(h:5-5)=9/9=1
h:5-5=1
h:5=5+1
h:5=6
h=6x5=30
Cocirmariadenis
(h : 5 - 5) × 9 +186 : 6 =400 : 10
( h : 5 - 5 ) x 9 + 31 = 40
( h : 5 - 5 ) x 9 = 40 - 31
( h : 5 - 5 ) x 9 = 9
h : 5 - 5 = 9 : 9 
h : 5 - 5 = 1
h : 5 = 1 + 5 
h : 5 = 6 
h = 6 x 5 
h = 30