Theo bài ra ta có :
abc5 = abc + 3083
=> abc0 + 5 = abc + 3083
=> abc x 10 + 5 = abc + 3083
=> abc x 10 - abc = 3083 - 5
=> abc x (10 - 1) = 3078
=> abc x 9 = 3078
=> abc = 3078 : 9
=> abc = 342
Vậy abc = 342
abc5 = abc + 3083
abc0 + 5 = abc + 3083
abc x 10 + 5 = abc x 1 + 3083
abc x 10 - abc x 1 = 3083 - 5
abc x 9 = 3078
abc = 3078 : 9 = 342
~ Hok tốt ~
\(\overline{abc5}=\overline{abc}+3083\)
\(\Leftrightarrow\overline{abc0}+5=\overline{abc}+3083\)
\(\Leftrightarrow\overline{abc}\times10+5=\overline{abc}\times1+3083\)
\(\Leftrightarrow\overline{abc}\times10-\overline{abc}\times1=3083-5\)
\(\Leftrightarrow\overline{abc}\times9=3083-5\)
\(\Leftrightarrow\overline{abc}\times9=3078\)
\(\Leftrightarrow\overline{abc}=3078:9=342\)
~ Hok tốt ~
