Ta có:
abc=a,bc x 100
\(\Rightarrow\)a,bc +xy =83,35
a,bc x 100+xy =514
\(\Rightarrow\)a,bc x 100 +xy-(a,bc+xy)=514-83,35
\(\Leftrightarrow\)a,bc x 100 +xy-a,bc- xy=430,65
\(\Leftrightarrow\)( a,bc x 100 -a,bc )+ (xy - xy)=430,65
\(\Leftrightarrow\)a,bc x 99 = 430,65
\(\Leftrightarrow\)a,bc=430,65 :99
\(\Leftrightarrow\)a,bc=4,35
Ta có : a,bc + xy =83,35
\(\Leftrightarrow\)xy= 83,35-4,35
\(\Leftrightarrow\)xy= 79
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