321 x 10
[698.(-X+12)].321-987=1000.5+6:10
321 x 321 x 321 x 321 x 0 =
321x321x321x321x0=0
đặt tính và tính
2345 x 100 257 x 1000 321 x 10 4565x100
hãy đưa kết quả
Tìm x biết
a/ (x+5)/325 + (x+7)/323 + (x+9)/321 + (x+10)/320 + ... + (x+338)/2 = 0
b/ |5x + 3| > 9
132/321 x 132/321=?
Giúp mik ik nha =3
timf x thuộc N biết
a/ 321 + 2(x -4) = 2017
b/ 48 - 3(x +5) =24
c/1230 : 3(x-20) = 10
d/2x - 238 = 2^3 x 3^2
a/ 321 + 2(x -4) = 2017
2(x -4) =1696
x-4=848
x=852
b/ 48 - 3(x +5) =24
3(x +5)=24
x+5=8
x=3
c/1230 : 3(x-20) = 10
3(x-20)=123
x-20=41
x=61
d/2x - 238 = 2^3 x 3^2
2x - 238 =72
2x=200
x=100
a) \(321+2\left(x-4\right)=2017\)
\(2x-8=2017-321\)
\(2x-8=1696\)
\(2x=1704\)
\(x=852\)
vay \(x=852\)
b) \(48-3\left(x+5\right)=24\)
\(3x+15=48-24\)
\(3x+15=24\)
\(3x=9\)
\(x=3\)
vay \(x=3\)
c) \(1230:3\left(x-20\right)=10\)
\(3x-60=1230:10\)
\(3x-60=123\)
\(3x=183\)
\(x=61\)
vay \(x=61\)
d) \(2x-238=2^3.3^2\)
\(2x-238=8.9\)
\(2x-238=72\)
\(2x=310\)
\(x=155\)
vay \(x=155\)
Cho mình hỏi bài này:
Tìm x biết
264+12 x=1800
(x+73):19=321
2x+3x+4x=18
10<2 x <20
264+12x=1800
12x=1536
x=128
(x+73):19=321
x+73=6099
x=6026
2x+3x+4x=18
9x=18
x=2
10<2x<20
=>5<x<10
x=6,7,8,9
\(264+12x=1800\)
\(\Leftrightarrow12x=1536\)
\(\Leftrightarrow x=128\)
==============
\(\left(x+73\right):19=321\)
\(\Leftrightarrow x+73=6099\)
\(\Leftrightarrow x=6026\)
===============
\(2x+3x+4x=18\)
\(\Leftrightarrow x.\left(2+3+4\right)=18\)
\(\Leftrightarrow x.9=18\)
\(\Leftrightarrow x=2\)
================
\(10< 2x< 20\)
..................................
\(2x=12\Leftrightarrow x=6\)
\(2x=14\Leftrightarrow x=7\)
\(2x=16\Leftrightarrow x=8\)
\(2x=18\Leftrightarrow x=9\)
\(x\in\left\{6;7;8;9\right\}\)
Cho mình hỏi bài này:
Tìm x biết
264+12 x=1800
(x+73):19=321
2x+3x+4x=18
10<2 x <20
12x = 1800 - 264
12x = 1536
x = 1536 : 12
x = 128
( x + 73 ) : 19 = 321
( x + 73 ) = 321 x 19
x + 73 = 6099
x = 6099 - 73
x = 6026
2x + 3x + 4x = 18
x . ( 2 + 3 + 4 ) = 18
x . 9 = 18
x = 18 : 9
x = 2
10 < 2x < 20
x = 6 ; 7 ; 8 ; 9
Tính theo mẫu?
Mẫu: 26 x 4 + 26 x 3 + 26 x 2 26 x 4 + 26 x 3 + 26 x 2 = 26 x (4 + 3 + 2) = 26 x 9 = 234. |
321 x 3 + 321 x 5 + 321 x 2
321 x 3 + 321 x 5 + 321 x 2
= 321 x (3 + 5 + 2)
= 321 x 10
= 3 210.
321 x 3 + 321 x 5 + 321 x 2
= 321 x (3 + 5 + 2)
= 321 x 10
= 3210