(15 x 9 - X - 0,15 ) : 0, 25 = 15 : 0,25
( 15 x 9 - X - 0,15) : 0,25 = 60
15 x 9 - X - 15 = 60 x 0, 25
15 x 9 - X - 15 = 15
15 x 9 - X= 15 + 15
15 x 9 - X = 30
135 - X = 30
X = 135 - 30
X = 105
ủng hộ mk nha !!!! ^_^
\(\left(15.19-x-0,15\right):0,25=15:0,25\)
\(\left(15.19-x-0,15\right)=60.0,25\)
\(15.19-x-0,15=15\)
\(285-x=15+0,15=15,15\)
\(x=285-15,15=269,85\)