120 +[(999-9.x): 60].24=480
Tìm x thuộc số tự nhiên
1440 : [120-(3.x9) ] =120
120 + [ ( 999-9.x) : 60 ] . 24=480
\(1440:\left[120-\left(3.9x\right)\right]=120\) \(120+\left[\left(999-9x\right):60\right].24=480\)
\(120-\left(3.9x\right)=1440:120\) \(\left[\left(999-9x\right):60\right].24=360\)
\(120-\left(3.9x\right)=12\) \(\left(999-9x\right):60=15\)
\(3.9x=120-12\) \(999-9x=900\)
\(3.9x=108\) \(9x=999-900\)
\(9x=108:3\) \(9x=99\)
\(9x=36\) \(x=99:9\)
\(x=4\) \(x=11\)
Tìm x biết 120+[(999-9x):60].24=480
120+[(999-9x):60].24=480
[(999-9x):60].24 = 480 - 120
[(999-9x):60].24 = 360
[(999-9x):60] = 360 : 24
[(999-9x):60] = 15
(999-9x) = 15 x 60
(999-9x) = 900
9x = 999 - 900
9x = 99
x = 99 : 9
x = 11
120+[(999-9x):60]=480-120
[(999-9x):60].24=360
(999-9x):60=360:24
(999-9x):60=15
(999-9x)=15.60
999-9x=900
990x=900
x=990:900
x=?
120+[(999-9x):60].24=480
[(999-9x):60].24 = 480 - 120
[(999-9x):60].24 = 360
[(999-9x):60] = 360 : 24
[(999-9x):60] = 15
(999-9x) = 15 x 60
(999-9x) = 900
9x = 999 - 900
9x = 99
x = 99 : 9
x = 11
Tìm x
120+ [ (999-9x) /60 ]= 480/24
Tình bày ra nhé
120+[(999-9x)/60]=480/24
120+[(999-9x)/60]=20
999-9x=20-120
999-9x=-100
9x=999-(-100)
9x=1099
x=1099/9
Vậy x=1099/9
giup minh 2 cau nay nhe ^^
1) 120 + ( (999-9x) : 60 ) x ( day la dau nhan ) 24= 480. Tim x
2) 3( x-9 ) + 15 = 12 + 243 : 32. Tim x
Giup mk nhe>.<!!!
Mk dang GAP!!!!!
1) 120 + ( 999 - 9x) : 6) = 20
999 - 9x : 6 = 140
999- 9x = 840
9x = 999 - 840
x = 17 dư 7
1. Tìm x, biết :
a. 1440: [120-(3x+9)] =120
b. 120+ [(999-9x):60].24 =480
c. (3x-48).6 =33.32+23.32 = 122
d. x10 = x
e. (2x-15)5 = (2x -15)3
f. 6.2x + 7.2x = 13.29
a. 1440 : [ 120 - (3x + 9 ) ] = 120
120 - (3x + 9) = 1440 : 120 = 12
3x + 9 = 120 - 12 = 108
3x = 108 - 9 = 99
x = 99 : 3 = 33
b. 120 + [ ( 999 - 9x ) : 60 ] . 24 = 480
[ ( 999 - 9x ) : 60 ] . 24 = 480 - 120 = 360
( 999 - 9x ) : 60 = 360 : 24 = 15
( 999 - 9x ) = 15 . 60 = 900
9x = 999 - 900 = 99
x = 99 : 9 = 11
Tìm n thuộc N, biết: 120 + [(999 - 9n).60] = 480
hình như đề sai đó bạn mình tính hoài mà không ra số tự nhiên
(17x-26).52016=52018
7x-2x=62+44:11
7x-4.710=3.710
2x+3+2x=144
720:[41-(2x-5)]=40
120+[(999-9x):60].24=480
7x-2x=6 mũ 2 +44:11
5x=36+4
5x=40
x=40:5=8
3*(x-9)+15=12+243:9
502-(x+5):2=318
120+[(999-9x):60]:24
ai giúp e vs nhanh lên đc k ạ
3 * ( x - 9) + 15 = 12 + 243 : 9
3 * ( x - 9 ) + 15 = 39
3 * ( x- 9 ) = 39 - 15
3 * ( x - 9 ) = 24
x - 9 = 24 : 3
x - 9 = 8
x = 8 + 9
x = 17
Vậy...
^^ Cbht!!!
3*(x-9)+15=12+243:9
3*(x-9)+15=12+27
3*(x-9)+15=39
3*(x-9)=39-15
3*(x-9)=24
x-9=24:3
x-9=8
x = 17
502-(x+5):2=318
(x+5):2=502-318
502-(x+5)=636
(x+5):2=184
(x+5)=184*2
(x+5)=368
x=363
120+[(999-9x):60]:24
3 * ( x - 9 ) + 15 = 12 + 243 : 9
3 * ( x - 9 ) + 15 = 12 + 27 = 39
3 * ( x - 9 ) = 39 - 15 = 24
x - 9 = 24 : 3 = 8
x = 8 + 9
x = 17 .
502 - ( x + 5 ) : 2 = 318
( x + 5 ) : 2 = 502 - 318 = 184
x + 5 = 184 x 2 = 368
x = 368 - 5
x = 363 .
120 + [ ( 999 - 9x ) : 60 ] : 24 = ?
tính tổng
35.53-20.{300-[546-23.(78:76+70)]}
tìm x
120 +[(999-9x):60].24=480
(3x-48).6=32.23+23.32-122
1
3\(^5\).5\(^3\)-20.{300-[546-2\(^3\).(7\(^8\):7\(^6\)+7\(^0\))]}
= 243.125-20.{300-[546-8.(49+1)
= 243.125-20.[300-(546-8.50)
= 243.125-20.[300-(546-400)
= 243.125-20.(300-146)
= 243.125-20.154
= 30375-3080
= 27295