Tĩm x
67-x+16=45
tìm x
(1900-2x):35-32=16
111+ 1818:(6x-37)=129
(x:3+45)x67-31=8880
(1900 - 2x) : 35 - 32 = 16
=> (1900 - 2x) : 35 = 48
=> 1900 - 2x = 1680
=> 2x = 220
=> x = 110
vậy_
111 + 1818 : (6x - 37) = 129
=> 1818 : (6x - 37) = 18
=> 6x - 37 = 101
=> 6x = 138
=> x = 23
vậy_
(x : 3 + 45) x 67 - 31 = 8880
=> (x : 3 + 45) x 67 = 8911
=> x : 3 + 45 = 133
=> x : 3 + = 88
=>x = 264
vậy_
[X:23+45]x67=8911
( x : 23 + 45 ) x 67 = 8911
=> x : 23 + 45 = 8911 : 67
=> x :23 + 45 = 133
=> x : 23 = 133 - 45
=> x : 23 = 88
=> x = 88 x 23
=> x = 2024
Giup toi bai tim x biet :
x : [ ( 1800 + 600 ) : 30 ] = 560 : ( 315 -35 )
(x:23+45)x67=8011
x:23+45=8011:67
x:23+45=8011/67
x:23=8011/67-45
x:23=4996/67
x=4996/67*23
x=114908/67
(x : 23 + 45) x 67 = 8011=> x : 23 + 45 = 8011 : 67 = 119\(\frac{38}{67}\)=> x : 23 = 119 \(\frac{38}{67}\)- 45 = 74\(\frac{38}{67}\)
=> x = 74\(\frac{38}{67}\).23 = 1715\(\frac{3}{67}\)
tìm x
a) (x+74)-318+200
b) 3636:(12x91)=36
c) (x:23+45)x67=8911
tìm x
(x+216):61+1=202
1818:(6x-37)+1=19
(x:23+45)x67+3=8914
a) ( x + 216 ) : 61 + 1 = 202
( x + 216 ) : 61 = 201
( x + 216 ) = 12261
x = 12045
b) 1818 : ( 6x - 37 ) + 1 = 19
1818 : ( 6x - 37 ) = 18
( 6x - 37 ) = 101
6x = 138
x = 23
c) ( x : 23 + 45 ) x 67 + 3 = 8914
( x : 23 + 45 ) x 67 = 8911
x : 23 + 45 = 133
x : 23 = 88
x = 2024
(x + 216) : 61 + 1 = 202
=> (x + 216) : 61 = 201
=> x + 216 = 12261
=> x = 12045
vậy_
1818 : (6x - 37) + 1 = 19
=> 1818 : (6x - 37) = 18
=> 6x - 37 = 101
=> 6x = 138
=> x = 23
vậy_
(x : 23 + 45) x 67 + 3 = 8914
=> (x : 23 + 45) x 67 = 8911
=> x : 23 + 45 = 133
=>x : 23 = 88
=> x = 2024
vậy_
\(a.\left(x+216\right):61+1=202.\)
\(\Leftrightarrow\left(x+216\right):6=201\)
\(\Leftrightarrow x+216=1206\)
\(\Rightarrow x=990\)
\(b.1818:\left(6x-37\right)+1=19.\)
\(\Leftrightarrow1818:\left(6x-37\right)=18\)
\(\Leftrightarrow6x-37=101\)
\(\Leftrightarrow6x=138\)
\(\Rightarrow x=23\)
\(c.\left(x:23+45\right)\times67+3=8914\)
\(\Leftrightarrow\left(x:23+45\right)\times67=8911\)
\(\Leftrightarrow x:23+45=133\)
\(\Leftrightarrow x:23=88\)
\(\Rightarrow x=2024\)
Tìm x biết
a) (x+74)-318=2015
b) 3636:(12 x X-91)=36
c) (x :23+45)x67=8911
a) ( x + 74 ) - 318 = 2015
=> x + 74 = 2015 + 318
=> x + 74 = 2333
=> x = 2333 - 74
=> x = 2259
b) 3636 : ( 12 . x - 91 ) = 36
=> 12 . x - 91 = 3636 : 36
=> 12 . x - 91 = 101
=> 12 . x = 101 + 91
=> 12 . x = 192
=> x = 192 : 12
=> x = 16
c) ( x : 23 + 45 ) . 67 = 8911
=> x : 23 + 45 = 8911 : 67
=> x : 23 + 45 = 133
=> x : 23 = 133 - 45
=> x : 23 = 88
=> x = 88 . 23
=> x = 2024
Tìm x, biết :
a) ( x + 74) - 318 = 2015
(x + 74) = 2015 + 318
(x + 74) = 2333
x = 2333 - 742
x = 2259
b) 3636 : (12 . x - 91) = 36
12 . x - 91 = 3636 : 36
12. x - 91 = 101
12 . x = 101 + 91
12 . x = 192
x = 192 : 12
x = 16
c) ( x : 23 + 45) . 67 = 8911
(x : 23 + 45) = 8911 : 67
(x : 23 + 45) = 133
x : 23 = 133 - 45
x : 23 = 88
x = 88 . 23
x = 2024
. là nhân nha
Tĩm x
a,(111-x )+7mũ 2=149
b , | x| + 18 = 163+(-45)
c, 7 mũ x-4 x6 =2058
\(a)\)\(\left(111-x\right)+7^2=149\)
\(\Leftrightarrow\)\(\left(111-x\right)+49=149\)
\(\Leftrightarrow\)\(\left(111-x\right)=149-49\)
\(\Leftrightarrow\)\(111-x=100\)
\(\Leftrightarrow\)\(x=111-100\)
\(\Leftrightarrow\)\(x=11\)
\(b)\)\(\left|x\right|+18=163+\left(-45\right)\)
\(\Leftrightarrow\)\(\left|x\right|+18=163-45\)
\(\Leftrightarrow\)\(\left|x\right|+18=118\)
\(\Leftrightarrow\)\(\left|x\right|=118-18\)
\(\Leftrightarrow\)\(\left|x\right|=100\)
\(\Leftrightarrow\)\(x=100\)
\(c)\)\(7^{x-4}\times6=2058\)
\(\Leftrightarrow\)\(7^{x-4}=2058\div6\)
\(\Leftrightarrow\)\(7^{x-4}=343\)
\(\Leftrightarrow\)\(7^{x-4}=7^3\)
\(\Leftrightarrow\)\(x-4=3\)
\(\Leftrightarrow\)\(x=3+4\)
\(\Leftrightarrow\)\(x=7\)
Tìm X
A. 3636: (12x X - 91) =36
B. (X: 22+ 45) x67= 8911
C. (X +74) -318= 200
D.5x X- 18 = 8+9
L. 1440: (125- X) =12
A . 3636 : ( 12 x X - 91 ) = 36
( 12 x X - 91 ) = 3636 : 36
( 12 x X - 91 ) = 101
12 x X = 101 + 91
12 x X = 192
X = 192 : 12
X = 16
B . (X: 22+ 45) x67= 8911
(X: 22+ 45) = 8911 : 67
(X: 22+ 45) = 133
X: 22 = 133 - 45
X: 22 = 88
X = 88 x 22
X = 1936
C . (X +74) -318= 200
X + 74 = 200 + 318
X + 74 = 518
X = 518 - 74
X = 444
D . 5x X- 18 = 8+9
5x X - 18 = 17
5x X = 17 + 18
5x X = 35
X = 35 : 5
X = 7
L . 1440: (125- X) =12
125 - X = 1440 : 12
125 - X = 120
X = 125 - 120
X = 5
K MÌNH NHA !!!
A. X=16
B. X=1936
C. X=444
D. X=7
L. X=5
TĨM THUỘC Z
|2X-5|<16
Ta có:|2x-5|<16
=>2x-5<16 hoặc 2x-5>-16
=>2x<21 hoặc 2x>-11
=>x<10,5 hoặc x>-5,5
=>x\(\le\)10 hoặc x\(\ge\)-5
=>x\(\in\){-5,-4,-3,-2,-1,0,1,2,3,4,5,6,7,8,9,10}
/2x-5/ <16 => /2x-5/ thuộc (0;1;2;3;....;16) => 2x-5 thuộc 0; (+-1); (+-2); ...; (+-16)
Vì 2x-5 ko chia hết cho 2 => 2x-5=(+-)1; (+-)3; ...;(+-)15. (các số lẻ nhé)
Với 2x-5 =1 => 2x=6 => x=6:2=3
-1 => 2x=4 => x=4:2=2
.
.
.(Cứ thế phân chia các trường hợp nhé)
(cứ thế phân chia các trường hợp nhé)