127 - 9 . ( x + 5 ) = 28
9x + 45 = 99
9x = 54
x = 6
Vậy,.........
127-9x(x+5)=28
9x(x+5)=127-28
9x(x+5)=99
x+5=99:9
x+5=11
x=11-5
x=6
127 - 9 x ( x + 5 ) = 28
127 - ( 9 x x + 45 ) = 28
127 - 9x - 45 = 28
82 - 9x = 28
9x = 54
x = 54 : 9
x = 6
\(127-9\cdot\left(x+5\right)=28\)
\(9x+45=99\)
\(9x=99-45\)
\(9x=54\)
\(x=54\text{ : }9\)
\(x=6\)
127 - 9 . ( x + 5 ) = 28
9 . ( x + 5 ) = 127 - 28
9 . ( x + 5 ) = 99
x + 5 = 99 : 9
x + 5 = 11
x = 11 - 5
x = 6
9.(x+5)=127-28
9.(x+5)=99
x+5 =99:9
x+5 =11
x=11-5
x=6
127 - 9 x ( x + 5 ) = 28
9x ( x + 5 ) = 127 - 28
9x ( x + 5 ) = 99
x + 5 = 99 : 9
x + 5 =11
x=11-5
x=6
dễ mà
127 - 9 x ( x + 5 ) = 28
127 - ( 9 x x + 45 ) = 28
127 - 9x - 45 = 28
82 - 9x = 28
9x = 54
x = 54 : 9