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2016 - 100. (x+11)= \(2^7:2^3\)
<=> 2016 - 100 (x+11) = 16
<=> 100(x+11)= 2000
<=> x+11= 10
<=> x = -1
Vậy ...
2016-100.(x+11)=27 : 23
<=>2016 -100x-1100=24
<=>-100x=16+1100-2016
<=> -100x=-900
<=> x=9
\(2448:\left[119-\left(x-6\right)\right]=24\)
\(119-\left(x-6\right)=2448:24\)
\(119-\left(x-6\right)=102\)
\(x-6=119-102\)
\(x-6=17\)
\(x=17+6\)
\(x=23\)( thỏa mãn \(x\in N\) )
vậy x = 23
\(2016-100\cdot\left(x+11\right)=2^7:2^3\)
\(2016-100\cdot\left(x+11\right)=128:8\)
\(2016-100\cdot\left(x+11\right)=16\)
\(100\cdot\left(x+11\right)=2016-16\)
\(100\cdot\left(x+11\right)=2000\)
\(x+11=2000:100\)
\(x+11=20\)
\(x=20-11\)
\(x=9\)( thỏa mãn \(x\in N\))
vậy x = 9
2016 - 100 . (x +11)= 27 :23
2016 - 100 . (x +11)= 24
2016 - 100 . (x +11)=16
100 . (x +11)= 2016 - 16
100 . (x +11)= 2000
x + 11 = 2000 : 100
x + 11 = 20
x = 20 - 11
x = 9
(=) 2016 - 100x + 1100 = 16
(=) -100x = 16 - 2016 - 1100
(=) -100x = -3100
(=) x = -3100 : (-100)
(=) x = 31
a) {[( 32 + 1 ) . 10 - ( 8 : 2 + 6 ) ] : 2 } + 55 -( 10 : 5 )3
= ( 10 . 10 - 10 : 2 ) + 55 - 6
= 90 : 2 ) + 55 - 6
= 45 + 55 - 6
= 100 - 6
= 94
b) 100 - [ 60 - ( 9 - 2 )2 ] . 32
= 100 - [ 60 - 72 ] . 9
= 100 - [ 60 - 49 ] . 9
= 100 - 11 . 9
= 100 - 99
= 1
c) [ ( 1253 ) . 75 - ( 175 )5 : 5 ] : 20162017
= 0 : 20162017
= 0
+ bài d kg hiểu! Xin lỗi
6x . 6 = 2016
6x = 2016 : 6
6x = 336
=> x \(\in\varnothing\)
42x+3 : 4 = 256
42x+3 = 256 x 4
42x+3 = 1024
42x+3 = 45
2x + 3 = 5
2x = 5 - 3
2x = 2
x = 2 : 2
x = 1
[ x - 2 ]2 = 16
[ x - 2 ]2 = 42
x - 2 = 4
x = 4 + 2
x = 6
[ 2x - 1 ]3 = 27
[ 2x - 1 ]3 = 33
2x - 1 = 3
2x = 3 + 1
2x = 4
x = 4 : 2
x = 2
[ 2x - 1 ]100 = [ 2x - 1 ]100
=> x \(\in N\)
2016 - 100 x (X + 30) = (-2)7 : (-2)3
2016 - 100 x (X + 30) = (-2)4
2016 - 100 x (X + 30) = 16
100 x (X + 30) = 2016 - 16
100 x (X + 30) = 2000
X + 30 = 2000 : 100
X + 30 = 20
X = 20 - 30
X = -10
Vậy x = -10