38*x+24*x+x=4221
DẤU * LA DAU NHAN NHA
-32/27-(3.x-7/9)3=-24/27
cac banlam nhanh nha minh can gap
dau cham la dau nhan nhe
Ta có : \(\frac{-32}{27}-\left(3x-\frac{7}{9}\right)^3=\) \(\frac{-24}{27}\)
<=> \(-\left(3x-\frac{7}{9}\right)^3=\left(\frac{2}{3}\right)^3\)
<=> \(-\left(3x-\frac{7}{9}\right)=\left(\frac{2}{3}\right)\)
<=> x= \(\frac{1}{27}\) -------chỗ này tắt
1. 1,2 : (0,4-x) = 2,5
2. x . 3,6 + x . 6,4 = 18,9
3. 9,4 : x + 5,3 : x = 14
Luu Y : dau "." la dau nhan nha.
1: =>0,5:(0,4-x)=2,5
=>0,4-x=0,5/2,5=0,5
=>x=0,4-0,5=-0,1
2: =>x*(3,6+6,4)=18,9
=>10x=18,9
=>x=1,89
3: =>(9,4+5,3):x=14
=>14,7:x=14
=>x=14,7/14=1,05
2 + x : 7 = 10
chữ x la chữ ích sờ nha cac bn ko phai la dau nhan dau nhe
(X-5)^2.(x-5)=-3.9 de bai tim x . Dau ^2 la mu 2 . Dau Cham la dau nhan
x + 2 . x +3. x + 4. x + ...+...+ 100.x = 5050
dau cha la dau nhan
x + 2.x + 3.x + 4.x + ... + 100.x = 5050
x.(1 + 2 + 3 + 4 + ... + 100) = 5050
x.(1 + 100).100:2 = 5050
x.101.50 = 5050
x.5050 = 5050
x = 5050 : 5050
x = 1
Vậy x = 1
8.6+288:(x-3)^2=50
dau cham la nhan do
giup voi nha !!!!!!!!!
\(8.6+288\left(x-3\right)^2=50\)
\(=>48+228\left(x-3\right)^2=50\)
\(=>288\left(x-3\right)^2=2\)
\(=>\left(x-3\right)^2=\frac{1}{144}\)
\(=>x-3=\frac{1}{12}\)
\(=>x=\frac{37}{12}\)
tim x
a, X x2,1 = 9,03
b, 3,54x X = 9,66
c, X:9,4 =23,5
d, 2,21;X=0,85
X to la X con x nho la dau nhan nha cac bn
cac bn oi nhanh tay giup mk nha
a, X x2,1 = 9,03
X=9,03:2,1
X=4,3
b, 3,54x X = 9,66
X=9,66:3,54
X=2.7289
c, X:9,4 =23,5
X=23,5x9,4
X=220,9
d, 2,21;X=0,85
X=2,21:0,85
X=2,6
Trả lời :.....................................
x = 2,6.................................
H k tốt,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
k nhé Nguyen Thi Thao Duyen
tim X
X x 2 + X x 3 = 40
x nho la dau nhan
ai nhanh minh TK nha...
X x 2 + X x 3 = 40
X x ( 2 + 3 ) = 40
X x 5 = 40
X = 40 : 5
X = 8
x*2+x*3=40
=>x*(2+3)=40
=>x*5=40
=>x=40:5
=>x=8
Vậy x=8
X x 2 + X x 3 = 40
X x(2+3)=40
X x 5 = 40
X = 40: 5
X = 8
7,2 chia 2,4 nhan X= 4,5
X nhan4,8 cong 5,2nhan X= 160
9,15nhan X cong 2,85 nhan X=48
[X nhan 3 cong 4 ] chia 5 =8
[15 nhan 28 - X] chia 2/5= 200 chia 0,4
7 nhan [8 cong 2 nhan X]= 210
X nhan 5,6 cong 4,4 nhan X= 130
[ X - 12] nhan 17 chia 11 = 51
9,15 nhan cong 2,85 nhan X= 48
tim X nha m.n
a ma cai nay mk rat voi nen nhanh jup mk nha
[......] cai nay la dau nghoach nha
1. . 7,2 : 2,4 x X = 4,5
3 x X = 4,5
X = 4,5 : 3
X = 1,5
2. X x 4,8 + 5,2 x X = 160
=> X x ( 5,2 + 4,8 ) = 160
X x 10 = 160
X = 160 : 10
X = 16
3. 9,15 x X + 2,85 x X =48
=> ( 9,15 + 2,85 ) x X = 48
12 x X = 48
X = 48 : 12
X = 4
4. ( X x 3 + 4 ) : 5 = 8
X x 3 + 4 = 8x 5
X x 3 + 4 = 40
X x 3 = 40 - 4
X x 3 = 36
X = 36 : 3
X = 12
5. ( 15 x 28 - x ) : 2/5 = 200 : 0,4
15 x 28 - x = 200 : 0,4 x 2/5
15 x 28 - x = 200
15 x 28 = 200 + x
420 = 200 + x
x = 420 - 200
x = 220
6. 7 x ( 8 + 2 x X ) = 210
8 + 2 x X = 210 : 7
8 + 2x = 30
=> 2x = 30 - 8
2x = 22
x= 22 : 2
x = 11
7. X x 5,6 + 4,4 x X = 130
X x ( 5,6 + 4,4 ) = 130
X x 10 = 130
X = 130 : 10
X = 13
8. ( x - 12 ) x 17 : 11 = 51
x - 12 = 51 x 11 : 17
x - 12 = 33
x = 33 + 12
x = 45
9. 9,15 x X + 2,85 x X = 48
X x ( 9,15 + 2,85 ) = 48
X x 10 = 48
X = 48 : 10
X = 4,8
cau nay ban lam sai