
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.


b)4.|x|-25=39:38
4.|x|-25=31(=3)
4.|x|=3+25
4.|x|=28
|x|=28:4
|x|=7
TH1: TH2:
x=7 x=-7
vậy x E(dấu thuộc nha) (7;-7)

a) 60 - 3.(x - 2) = 51
3.(x - 2) = 60 - 51
3.(x - 2) = 9
x - 2 = 9 : 3
x - 2 = 3
x = 3 + 2
x = 5
b) 4x - 20 = 25 : 22
4x - 20 = 23
4x - 20 = 8
4x = 8 + 20
4x = 28
x = 28 : 4
x = 7
60 - 3 ( x - 2 ) = 51
57 ( x - 2 ) = 51
x - 2 = 57 - 51
x - 2 = 6
x = 6 + 2
x = 8

1) \(\Leftrightarrow x+11-15+x+20=0\)
\(\Leftrightarrow2x+16=0\)
\(\Leftrightarrow x=-8\)
2) \(\Leftrightarrow2x-16+x-13=16\)
\(\Leftrightarrow3x-45=0\)
\(\Leftrightarrow x=15\)
Những câu dưới bạn làm tương tự như vậy nhé
1)(x+11)–(15–x) =–20
x+11 - 15 + x = -20
x + ( 11 -15 ) = -20
x + ( -4 ) = -20
x = -20 - ( -4 )
x = -16

9x+5.4 = 200 4x-20 = 2^5:2^2 2.3^x-5=157
9x+ 20 = 200 4x-20 = 2^3 2.3^x=157+5
9x = 200-20 4x-20 = 8 2.3^x=162
9x = 180 4x = 8+20 3^x=162:2
x= 180 : 9 4x = 28 3^x=81
x=2 x = 28:4 mà 3^4=81 => x=4
x = 7

1) x - 36 + 12 = - x+ 10
=> x + x = 10 + 24
=> 2x = 34
=> x = 34/2 = 17
2) (x + 15) - (11 - x) = (-2)2
=> x + 15 - 11 + x = 4
=> 2x = 4 - 4
=> 2x = 0
=> x = 0
3) 40 - 4x2 = (-6)2
=> 40 - 4x2 = 36
=> 4x2 = 40 - 36
=> 4x2 = 4
=> x2 = 1
=> x = \(\pm\)1
4) (-50) + 10x2 = (-25) x |-2|
=> -50 + 10x2 = -50
=> 10x2 = -50 + 50
=> 10x2 = 0
=> x2 = 0
=> x = 0
5) |x + 1| = 2020
=> \(\orbr{\begin{cases}x+1=2020\\x+1=-2020\end{cases}}\)
=> \(\orbr{\begin{cases}x=2019\\x=-2021\end{cases}}\)
6) (x + 1)5 + 8 = 0 (xem lại đề)
7) (-20) + x3 : 16 = -24
=> x3 : 16 = -24 + 20
=> x3 : 16 = -4
=> x3 = -4 . 16
=> x3 = -64 = (-4)3
=> x = -4
9) x14 = x17
=> x14 - x17 = 0
=> x14(1 - x3) = 0
=> \(\orbr{\begin{cases}x^{14}=0\\1-x^3=0\end{cases}}\)
=> \(\orbr{\begin{cases}x=0\\x=1\end{cases}}\)
10) (-36) + (1 - x)2 = 0
=> (1 - x)2 = 36
=> (1 - x)2 = 62
=> \(\orbr{\begin{cases}1-x=6\\1-x=-6\end{cases}}\)
=> \(\orbr{\begin{cases}x=-5\\x=7\end{cases}}\)

4x - 20 = 25 : 22
=> 4x - 20 = 8
=> 4x = 8 + 20
=> 4x = 28
=> x = 28 : 4
=> x = 7

\(60-3\left(x-2\right)=51\)
\(\Leftrightarrow3\left(x-2\right)=60-51\)
\(\Leftrightarrow3\left(x-2\right)=9\)
\(\Leftrightarrow x-2=3\)
\(\Leftrightarrow x=5\)
\(4x-20=2^5:2^2\)
\(\Leftrightarrow4x-20=2^3\)
\(\Leftrightarrow4x-20=8\)
\(\Leftrightarrow4x=28\)
\(\Leftrightarrow x=7\)
mình cảm ơn bạn nha
bạn cố gắng suy nghĩ để làm lốt hộ mình nha , cảm ơn bạn rất nhiều

a/ (ghi lại cái đề)
=>+ 3x-7=2
3x=2+7=9
x=3
+ 3x-7=-2
3x=-2+7=5
x=\(\frac{5}{3}\)
b/ (5x-10)2=100
=> +5x-10=10
5x=10+10=20
x=4
+ 5x-10=-10
5x=-10+10=0
x=0

14 + (273 - 7x) . 2 = 518
(273 - 7x) . 2 = 504
273 - 7x = 252
7x = 21
x = 3
Vậy...........
4x-20=\(2^5\):\(2^3\)
4x-20=32:8
4x-20=4
4x =4+20
4x =24
x =24:4
x =6
vậy...
mong quản lí trả lại cho em nik trần bảo minh thư kia vs
hôm nay thg em em nó nghịch nik em mà