1170-(x-13) = 339 - 3x100
1170 - (x-13) = 339 - 300
1170-(x-13) = 39
x-13 = 1170-39
x-13 = 1131
x = 1131+13 =11 44
1170 : (x - 13) = 339 - 3 . 102
1170 : (x -13) = 339 - 3 . 100
1170 : (x -13) = 339 - 300
1170 : (x - 13) = 39
x - 13 = 1170 : 39
x - 13 = 30
x = 30 + 13
x = 43
vậy x = 43
ủng hô mk nha
\(1170\div\left(x-13\right)=339-3.100\)
\(1170\div\left(x-13\right)=339-300\)
\(1170\div\left(x-13\right)=39\)
\(x-13=1170\div39\)
\(x-13=30\)
\(x=30+13\)
\(x=43\)
\(Vay\)\(x=43\)
