tim so nguyen x bt
x – 18 = 22 – 47
b) 4 2 – x = 53 – 60
c) 25 – 2x = 16 – 3x
d) x – (47 – 22) = 5+ (10 – 4x)
tim so nguyen x bt
25 – 2x = 16 – 3x
d) x – (47 – 22) = 5+ (10 – 4x) ai giup mik vs
25 – 2x = 16 – 3x
-2x + 3x = 16 - 25
x = -9
Vậy x = -9
x - (47 - 22 ) = 5 + (10-4x)
x - 47 + 22 = 5 + 10 - 4x
x + 4x = 5 + 10 - 22 + 47
5x = 40
x = 40 : 5
x = 8
Vậy x = 8.
~ HOK TỐT ~
\(\text{25 – 2x = 16 – 3x}\)
\(2x+3x=16-25\)
\(5x=-9\)
\(\Rightarrow x=\frac{-9}{5}\)
\(\text{d) x – (47 – 22) = 5+ (10 – 4x)}\)
\(x-47+22=5+10-4x\)
\(x+4x=5+10-22+47\)
\(5x=40\)
\(\Rightarrow x=8\)
học tốt
\(25-2x=16-3x\)
\(\Leftrightarrow25-2x-16=-3x\)
\(\Leftrightarrow-2x+9=-3x\)
\(\Leftrightarrow-3x+2x=9\)
\(\Leftrightarrow-x=9\Leftrightarrow x=9\)
Vậy ...
\(x-\left(47-22\right)=5+\left(10-4x\right)\)
\(\Leftrightarrow x-47+22=5+10-4x\)
\(\Leftrightarrow x-25=5+10-4x\)
\(\Leftrightarrow x-25=-4x+15\)
\(\Leftrightarrow x=-4x+15+25\)
\(\Leftrightarrow x=-4x+40\)
\(\Leftrightarrow x+4x=40\Leftrightarrow5x=40\Leftrightarrow x=8\)
Vậy ...
Tim so nguyen x , biet : 1 phan 6 = x phan 18 ; x phan 8 = -1 phan 4 ; 4 phan -5 = x phan 10 ; 11 phan 5 = -22 phan x ; x phan 8 = 8 phan x ; x phan -11 = -11 phan x
\(\frac{1}{6}=\frac{x}{18}\Rightarrow x=3\)
\(\frac{x}{8}=-\frac{1}{4}\Rightarrow x=-2\)
\(\frac{4}{-5}=\frac{x}{10}\Rightarrow x=-8\)
\(\frac{11}{5}=-\frac{22}{x}\Rightarrow x=-10\)
\(\frac{x}{8}=\frac{8}{x}\Rightarrow x^2=64\Rightarrow x=8\)
\(\frac{x}{-11}=-\frac{11}{x}\Rightarrow x^2=121\Rightarrow x=11\)
#H
tim so nguyen x
(3x+9).(3x-6)=0(2x+15)-25=47-(10-x)30(x=2)-6(x-5)-24x=100/4-3x/=8/2x-5/=13/7x+3/=661) (3x + 9)(3x - 6) = 0
=> \(\orbr{\begin{cases}3x+9=0\\3x-6=0\end{cases}}\)
=> \(\orbr{\begin{cases}3x=-9\\3x=6\end{cases}}\)
=> \(\orbr{\begin{cases}x=-3\\x=2\end{cases}}\)
Vậy ...
b) (2x + 15) - 25 = 47 - (10 - x)
=> 2x - 10 = 37 + x
=> 2x - x = 37 + 10
=> x = 47
3, tương tự
4) |4 - 3x| = 8
=> \(\orbr{\begin{cases}4-3x=8\\4-3x=-8\end{cases}}\)
=> \(\orbr{\begin{cases}3x=-4\\3x=12\end{cases}}\)
=> \(\orbr{\begin{cases}x=-\frac{4}{3}\\x=4\end{cases}}\)
Vì x là số nguyên nên ...
còn lại tương tự
Tim cac so nguyen x thoa man
A)/2x-2/=x+18. :-) B)/2x-8/+4x=16
a) | 2x - 2 | = x + 18
=> 2 TH:
- TH 1: 2x - 2 = x +18
=> x = 20.
TH 2: 2x - 2 = - x - 18
3x = 16( Loại vì x không nguyên)
Vậy x = 20.
b) | 2x - 8 | + 4x = 16
| 2x - 8 | = 16 - 4x
=> Có 2 TH:
- TH 1: 2x - 8 = 16 - 4x
6x = 24
=> x = 4.
- TH 2: 2x - 8 = -16 + 4x
-2x = -8
=> x = 4.
Vậy x = 4 (chỉ nêu 1 đáp án thôi nhé, không cần phải cả hai đâu)
tim so nguyen x
a)2x - 5 = -11
b) 22 -(-x) = 12
a)2x - 5 = -11
\(2x=-11+5\)
\(2x=-6\)
\(x=-3\)
b) 22 -(-x) = 12
\(-x=22-12\)
\(-x=10\)
\(x=-10\)
học tốt
Bài 3. Tính giá trị của mỗi biểu thức sau:
a) 22 3 25 A x x tại 3 x
b) 25 2 18 B x x tại 4x
c) 3 5 10 C x y tại 5 1
6 2
x ; y
d) 3 22 3 8 5 D x y z tại 3 2 3 x ; y ; z
cau 1.tim x
a)15-|x-4|=6
b)-30+|25-x|=-1
c)x-(12-25)=-8
d) (x-29)-(17-38)=-9
cau 2.tim so nguyen x
a,22-(-x)=12
b,(x+5)+(x-9)=x+2
c,(27-x)+(15+x)=x-24
tim so nguyen x biet
a,9-25=[7-x]-[25+7]
b,-26-[x-7]=0
c,30+[32-x]=10
d,2.x-18=10
e,3.x+26=5
f,/x/-5=-12+30
g,[/x/+1].[4-2x]=0
h,8+/x/=/-8/+11
i,4.[x+1]-[3x+1]=14
a) \(\dfrac{x-45}{55}\)+\(\dfrac{x-47}{53}\)=\(\dfrac{x-55}{45}\)+\(\dfrac{x-53}{47}\)
b)\(\dfrac{1}{9}\).(x-3)2 - \(\dfrac{1}{25}\).(x+5)2 =0
c)(x+6)4 + (x+8)4 =0
d)x4 - 4x2 +12x - 9 = 0
e) (2x+1).(x+1)2.(2x+3)= 18
Mk xin lỗi nha, câu c sai đề
c) (x+6)4 + (x+8)4 = 272