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Va rog frumos sami faceti ex asta
[(72:a-3×4)×36-19×5]-(124×6-301×2=195

Răspuns :

Liliana18
[(72:a-3x4)x36-19x5] -(124x6-301x2)=195 
 
[(72:a -12)x36-95]-(744-602)=195
 
[(72:a-12)x36-95]-142=195 
 
(72:a-12)x36-95=195+142 
 
(72:a-12) x36=337+95 
  
(72:a-12)x36=432 
  
72:a-12=432:36 
  
72:a-12=12 
 
72:a=12+12 
  
72:a=24 
  
a=72:24 
  
a=3   

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