[ 3,8 : ( x + 1,05 ) ] : 1/3 = 2 1/9
19/5 : ( x + 1,05 ) = 21/9 x 1/3
19/5 : ( x + 1,05) = 7/9
x + 1,05 = 19/5 : 7/9
x + 21/20 = 171/35
x = 171/35 - 21/20
x = 228/49
[ 3,8 : ( x + 1,05 ) ] : 1/3 = 2 1/9
=> 3,8 : ( x+1,05) = 19/9 x 1/ 3 = 19/27
=> x + 1,05 = 3,8 : 19/27 = 5,4
=> x= 5,4-1,05 = 4,35
\(\left(3,8:\left(x+1,05\right)\right):\frac{1}{3}=\frac{21}{9}\)
\(=>3,8:\left(x+1,05\right)=\frac{7}{9}\)
\(=>x+1,05=\frac{171}{35}\)
\(=>x=\frac{537}{140}\)
Sai hết rồi nha @@@@
