3*(x-7)-12=15
(2*x-10)*(x-2019)=0
ak đây là bài tìm x lớp 6
các bạn giúp em mk giải nha
1h15 chìu nay nó ik hc r
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HM
2
31 tháng 8 2019
a) \(\sqrt{x+1}=12\)
\(x+1=144\)
\(x=144-1\)
\(x=143\)
b) \(2x^2-1=5\)
\(2x^2=5+1\)
\(2x^2=6\)
\(x^2=3\)
\(x=\pm\sqrt{3}\)
31 tháng 8 2019
\(a,\sqrt{x+1}=12\)
\(\Rightarrow x+1=144\)
\(x=144-1\)
\(x=143\)
\(b,\left(2x\right)^2-1=5\)
\(2x^2=1+5\)
\(2x^2=6\)
\(\Rightarrow x^2=3\)
\(\Rightarrow x=\perp\sqrt{3}\)
AO
2 tháng 2 2018
c) \(\left(2x-3\right)-\left(-12\right)=-5-10\)
\(2x-3+12=-15\)
\(2x+9=-15\)
\(2x=-24\)
\(x=-12\)
d) \(17-\left(43-\left|x\right|\right)=45\)
\(17-43+\left|x\right|=45\)
\(-26+\left|x\right|=45\)
\(\left|x\right|=45+26\)
\(\left|x\right|=71\)
\(\Rightarrow\orbr{\begin{cases}x=71\\x=-71\end{cases}}\)
2 tháng 2 2018
a) 82 - (15 + x) = 72
=> 15 + x = 82 - 72
=> 15 + x = 10
=> x = 10 - 15
=> x = -5
Vậy x = -5
b) 24 - (x - 6) = -3 - 7
=> 24 - (x - 6) = -10
=> x - 6 = 24 + 10
=> x - 6 = 34
=> x = 34 + 6
=> x = 40
Vậy x = 40
RS
1
20 tháng 5 2018
2^x+1 . 3^y = 12^x
\(\Rightarrow\)2^x+1 . 3^y =( 2^2 . 3 )
\(\Rightarrow\)2^x+1 . 3^y =2^2x . 3^x
\(\Rightarrow\)\(\frac{2^{2x}}{2^{x+1}}\)= \(\frac{3^y}{3^x}\)
\(\Rightarrow\)2^2x - (x+1) = 3^y - x
\(\Rightarrow\)2^x+1 = 3^y - x
Ta có : 3^y - x lẻ
\(\Rightarrow\)2^x - 1 lẻ
\(\Rightarrow\)x- 1 = 0 \(\Rightarrow\)x=1
3^y - 2 = 2^0 = 1
\(\Rightarrow\)y - x = 0
=> x = y = 1
Lại gặp bn ha.Chúc bn hc tốt
26 tháng 11 2018
The Pagoda of the Celestial Lady (Vietnamese: Chùa Thiên Mụ; also called Linh Mụ Pagoda) is a historic temple in the city of Huế in Vietnam. Its iconic seven-story pagoda is regarded as the unofficial symbol of the city,[1] and the temple has often been the subject of folk rhymes and ca dao about Huế.[2]
The pagoda sits on the Hà Khê hill, in the ward of Hương Long in Huế. It is around 3 kilometres (1.9 mi) from the Citadel of Huế constructed by the Nguyễn Dynasty and sits on the northern bank of the Perfume River.[2][1]
Built in 1601 on the order of the first Nguyễn lords, Nguyễn Hoàng, who at that time was the governor of Thuận Hóa (now known as Huế). The Nguyen Lords were in name, officials of the ruling Lê Dynasty in Hanoi, but was the de factoindependent ruler of central Vietnam. According to the royal annals, Hoang while touring the vicinity, was told of the local legend in which an old lady, known as Thiên Mụ (literally "celestial lady"), dressed in red and blue sat at the site, rubbing her cheeks. She foretold that a lord would come and erect a pagoda on the hill to pray for the country's prosperity. She then vanished after making her prophecy. Upon hearing this, Hoang ordered the construction of a temple at the site, thus the beginning of Thiên Mụ Tự.[2][1]
The original temple was simply constructed, then later expanded and refurbished. In 1665, major construction was undertaken by the Nguyễn Lord Nguyễn Phúc Tần.[2]
DD
13 tháng 7 2018
47. (23 + 50)- 23. ( 47+50 )
= 47. 23+ 47. 50- 23. 47 - 23. 50
=47. 50 - 23. 50
= 50 .( 47 -23)
=50. 24 = 1200
NT
Nguyễn Thị Thương Hoài
Giáo viên
VIP
21 tháng 2
-x + 20 = - (-15) - (8) + 13
-x + 20 = 15 - 8 + 13
-x + 20 = 7 + 13
- x + 20 = 20
x = 20 - 20
x = 0
NT
Nguyễn Thị Thương Hoài
Giáo viên
VIP
21 tháng 2
-(-10) + x = -13 + (-9) + (-6)
10 + x = -13 - 9 - 6
10 + x = -28
x = -28 - 10
x = -38
MH
29 tháng 12 2015
1. -x+20 = -(-15)-8+13
=> -x=15-8+13-20
=> -x=0
=> x=0
2. -(-10)+x=-13+(-9)+(-6)
=> 10+x=-13-9-6
=> x = -13-9-6-10
=> x = -38
3. 8-(-12)+10=-(-14)-x
=> 8+12+10=14-x
=> x = 14-8-12-10
=> x = -16
4. -(+12)+(-x)-(-3)=5-(-7)
=> -12-x+3=5+7
=> -x=5+7+12-3
=> -x=21
=> x=-21
5. 14-x+(-10)=-(-9)+(+15)
=> 14-x-10=9+15
=> -x=9+15-14+10
=> -x=20
=> x=-20
6. 12-(-17)+(-3)=-5+x
=> 12+17-3+5=x
=> x=31
7. x-(-19)-(+32)=14-(+16)
=> x+19-32=14-16
=> x=14-16+32-19
=> x=11
8. x-|-15|-|7|=-(-9)+|-5|
=> x-15-7=9+5
=> x=9+5+7+15
=> x=36
9. 15-x+17=13-(-21)
=> 15-x+17=13+21
=> -x=13+21-15-17
=> -x=2
=> x=-2
10. -|-5|-(-x)+4=3-(-25)
=> -5+x+4=3+25
=> x=3+25-4+5
=> x=29
Bài em bạn sao bạn ko giải đi vs lại nó dễ
a)x=16
b)x=5 hoặc x=2019