=>1170(x-13)=339-3*100=39
=>x-13=39/1170=1/30
=>x=1/30+13=391/30
`1170 . ( x - 13 ) = 339 - 3 . 10^2`
`1170 . ( x - 13 ) = 339 - 300`
`1170 . ( x - 13 ) = 39`
`x - 13 = 1170 : 39`
`x - 13 = 30`
`x = 30 + 13`
`x = 43`
`@ZenZ`
Vậy x = 43
\(1170(x-13)=339-3.10^2\)
\(1170(x-3)=339-3.100\)
\(1170(x-3)=33600\)
\(x-3=33600-1170\)
\(x-3=324300\)
\(x=324300+3\)
\(x=324303\)