x2 . 23= 128
(-2)5+[(-7)3:49+23]:(-2)
128(278-302)+278(302-128)
128 – 3(x + 4) = 23
128 – 3(x + 4) = 23
3.(x + 4) = 128 – 23
3.(x + 4) = 105
x + 4 = 105 : 3
x + 4 = 35
x = 35 – 4
x = 31
`128-3(x+4)=23`
`3(x+4)=128-23`
`3(x+4)=105`
`x+4=105:3=35`
`x=35-4=31`
3 x (x + 4) = 128 - 23
3 x (x + 4) = 105
x + 4 = 105 : 3
x+4=35
x=35-4
x=31
128+127+12+23=.......
128 + 127 + 12 + 23
= 255 + 12 + 23
= 267 + 23
= 290
128 + 127 + 12 + 23
= 255 + 12 + 23
=290
128 * 3 ( x4 ) - 23
Thực hiện phép tính:
a) 25 –[ 50 – ( 2 3 . 17 – 2 3 . 14 )]
b) |-128| : [ 45 2 – ( 2010 – 2008 0 . 1 2010 )]
a) 25 –[ 50 – ( 2 3 . 17 – 2 3 . 14 )]
= 25 – ( 50 – 23 . 3 ) = 25 – ( 50 – 24 )
= 25 – 26 = -1
b) |-128| : [ 45 2 – ( 2010 – 2008 0 . 1 2010 )]
= 128 : [ 2025 – ( 2010 – 1 . 1 )] = 128 : ( 2025 – 2009 ) = 128 : 16 = 8
128-3x(x+4)=23
128-3(x+4)=23
3(x+4)=128-23
3(x+4)=105
x+4=105:3
x+4=35
x=35-4
x=31
128-3(x+4)=23
3(x+4)=128-23
3(x+4)=105
x+4=105:3
x+4=35
x =35-4
x =31
128-3.(x+4)=23
128 - 3 ( x + 4 ) = 23
3( x + 4 ) = 128 - 23 = 105
x + 4 = 105 : 3 = 35
x = 35 - 4 = 31
128-3.(x+4)=23
=> 3.(x+4)=128-23
=> 3.(x+4)=105
=> x+4=105:3
=> x+4=35
=> x=35-4
=> x=31
128-3.(x+4)=23
128 - 3(x + 4) = 23
\(\Leftrightarrow\)3(x + 4) = 128 - 23 = 105
\(\Leftrightarrow\)x + 4 = 105 : 3 = 35
\(\Leftrightarrow\)x = 35 - 4 = 31
Vậy x = 31
128-3.(x+4)=23
3.(x+4)=128-23
3.(x+4)=105
x+4=105:3
x+4=35
x=35-4
x=31
128-3.(x+4)=23
3.(x+4)=128-23
3.(x+4)=105
x+4=105:3
x+4=35
x=35-4
x=31
OK k mk nha
128-3(X+4)=23
128-3.(x+4)=23
128 - 3. ( x + 4 ) = 23
3 . ( x + 4 ) =128 - 23
3 . ( x + 4 ) = 105
x + 4 = 105 : 3
x + 4 = 35
x = 35 - 4
x = 31
128 - 3 . ( x + 4 ) = 23
3 . ( x + 4 ) = 128 - 23
3 . ( x + 4 ) = 105
x + 4 = 105 : 3
x + 4 = 35
x = 35 - 4
x = 31
kick mk đi mk kick lại
128-3.[x+4] bằng 23
3.[x+4] bằng 128-23
3.[x+4] bằng 105
[x+4] bằng 105:3
x+4 bằng 35
x bằng 35-4
x bằng 31
Vậy x bằng 31