10 . (3x - 2) - 32 . 23 = 28
=> 10 . (3x - 2) - 9 . 8 = 28
=> 10 . (3x - 2) - 72 = 28
=> 10 . (3x - 2) = 100
=> 3x - 2 = 10
=> 3x = 12
=> x = 12 : 3 = 4
Vậy x = 4
\(10\left(3x-2\right)-9\cdot8=28\)
\(10\left(3x-2\right)-72=28\)
\(10\left(3x-2\right)=28+72\)
\(10\left(3x-2\right)=100\)
\(3x-2=100:10\)
\(3x-2=10\)
\(3x=12\)
\(x=4\)
10.(3x-2)-9.8=28
10.(3x-2)-9+28:8
10.(3x-2)-9=7/2
10.(3x-2)=7/2+9
10.(3x-2)=25/2
3x-2=25/2:10
3x-2=5/4
3x=5/4+2
3x=13/4
x=13/4:3
x=13/12
10.(3x-2)-9.8=28
10.(3x-2)-72=28
10.(3x-2)=72+28
10.(3x-2)=100
(3x-2)=100:10
(3x-2)=10
3x=10+2
3x=12
x=12:3
x=4
vậy x=4
10.(3x-2)-32.23=28
<=>10.(3x-2)-9.8 =28
<=>10.(3x-2)-72 =28
<=>10.(3x-2) =28+72
<=>10.(3x-2) =100
<=>3x-2 =100:10
<=>3x-2 = 10
<=>3x = 10+2
<=>3x = 12
<=>x =12:3
<=>x =4
vậy x=4
