4 x : 17=0
a. ( x - 1200 )^2 + ( x + 2015 )^ 4 = 0
b. / 17 - x / . / y - 18 / = 0
c. / 17 - x / + / 17 - y / = 0
a) 37 ( x - 15 ) = 0
b) ( x - 17 ) . 23 = 23
c) ( x - 2 ) ( x -4 ) = 0
d) ( x + 12 ) . 53 = 1060
e) 4 . ( x - 50 ) + 160
f) ( 17 -x ) : 6 = 2
a) 37 (x-15)=0
x-15 =0
x =15
b) (x-17).23=23
x-17 =1
x =1+17
x =18
c) (x-2) (x-4)=0
Th1: x-2=0
x =0+2
x =2
TH2: x-4=0
x =0+4
x =4
Vậy x=2 hoặc x=4
d) (x+12) . 53=1060
x+12 =1060:53
x+12 =20
x =20-12
x =8
e) 4 . (x-50) = 160
x-50 =160:4
x-50 =40
x =40+50
x =90
f) (17-x) : 6=2
17-x =2 . 6
17-x =12
x =17-12
x =5.
Chúc học tốt!
(2x-4)(x=22)=0
(x-17)(x^2-16)=0
(x^2+3)(x+8)=0
a)
(2x-4)(x-22)=0
<=>2x-4=0 hoặc x-22=0
<=>x=2 hoặc x=22
b
(x-17)(x^2-16)=0
<=>x-17 =0 hoặc x^2-16=0
<=>x=17 hoặc x=4 hoặc x=-4
c
(x^2+3)(x+8)=0
Vì x^2+3>0
=>x+8=0
<=>x=-8
Tìm x biếta) x÷0,(7)=0,(32):2,(4)
b)0,(17):2,(3)=x:0,(3)
a) x÷0,(7)=0,(32):2,(4)
\(x:\frac{7}{9}=\frac{32}{99}:\frac{22}{9}\)
\(x:\frac{7}{9}=\frac{16}{121}\)
\(x=\frac{16}{121}.\frac{7}{9}\)
\(x=\frac{112}{1089}\)
b)0,(17):2,(3)=x:0,(3)
\(\frac{17}{99}:\frac{7}{3}=x:\frac{1}{3}\)
\(\frac{17}{231}=x:\frac{1}{3}\)
x=\(\frac{17}{231}.\frac{1}{3}\)
\(x=\frac{17}{693}\)
a,| x+13/7 | + | y+2009/2008 | + | z-2007 |=0
b,| x-1/2 | + | y+3/2 | + | z-5/2 | \(\le\)0
c,| x+11/17 | + | x+2/17 | + | x+4/17 | =42
TÌM X
a) /x-17/=2,3
b) /x+3/4/=0
c)/x+3/4/+1/3=0
a) \(\left|x-17\right|=2,3\)
\(\Leftrightarrow\left[{}\begin{matrix}x-17=2,3\\x-17=-2,3\end{matrix}\right.\)\(\Leftrightarrow\left[{}\begin{matrix}x=19,3\\x=14,7\end{matrix}\right.\)
b) \(\left|x+\dfrac{3}{4}\right|=0\)
\(\Leftrightarrow x+\dfrac{3}{4}=0\Leftrightarrow x=-\dfrac{3}{4}\)
c) \(\left|x+\dfrac{3}{4}\right|+\dfrac{1}{3}=0\)
\(\Leftrightarrow\left|x+\dfrac{3}{4}\right|=-\dfrac{1}{3}\)( vô lý do \(\left|x+\dfrac{3}{4}\right|\ge0\forall x\))
Vậy \(S=\varnothing\)
a, x – 8 : 2 = (-4) b, (-5) . x – 7 = (-17) e) 7. (4 – x) < 0
\(x-8:2=-4\\ x-4=-4\\ x=-4+4\\ x=0\\ -5.x-7=-17\\ -5.x=-17+7\\ -5.x=-10\\ x=-10:\left(-5\right)\\ x=2\\ 7.\left(4-x\right)< 0\\ 4-x< 0:7\\ 4-x< 0\\ x\in\left\{5;6;7;8;...\right\}\)
a) \(...\Rightarrow x-4=-4\Rightarrow x=-4+4-0\)
b) \(...\Rightarrow-5x=-17+7\Rightarrow-5x=-10\Rightarrow x=\left(-10\right):\left(-5\right)=2\)
c) \(...\Rightarrow4-x< 0\Rightarrow x>4\)
Bài 1: Tìm số tự nhiên x, biết:
a,36 : [ 7(x - 3) + 4 ] = 24 :23
b,[(6x - 39) : 3 ] . 28 = 5628
c,(2x -7) - (x + 135)=0
d,24 .125 + 52 . 25
e,17 . 27 +17 . 25 + 17 . 48
g,122 + (37 - 3x) = 0
h,(14 - 3x) + (6+x) = 0
4.x:17=0 ; 7.x-8=713 ; 8.(x-3)=0 . mong moi nguoi giup do :))
4.x:17= 0
4.x=0:17
4.x=0
x=0:4
x=0
7.x-8=713
7.x=713+8
7.x=721
x=721:7=103
x-3=0:8
x.3=0
x=0:3
x=0