tìm x : x x 9 - x x 6=135
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.


a,x/9=5/3 = x=15
b,17/x=85/105 = x = 21
c,6/8=15/x = x = 20
d,x/8=2/3 = x = 6

a: =24*1000=24000
b: =120*1000=120000
c: =72(135+65):25-140
=72*8-140=436
d: =18(957-354-621):72=-9/2



Đặt tính rồi tính :
15 x 8=120
135 x 6=810
720 : 9=80
475 : 5=95

a: 17-2x=9
=>2x=17-9=8
=>x=8/2=4
b: \(145-135\left(x-2\right)^2=10\)
=>\(135\cdot\left(x-2\right)^2=135\)
=>\(\left(x-2\right)^2=1\)
=>\(\left[{}\begin{matrix}x-2=1\\x-2=-1\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=3\\x=1\end{matrix}\right.\)
c: \(x\inƯ\left(36\right)\)
=>\(x\in\left\{1;-1;2;-2;3;-3;4;-4;6;-6;9;-9;12;-12;18;-18;36;-36\right\}\)
mà x>12
nên \(x\in\left\{18;36\right\}\)
d: \(x-1\in B\left(9\right)\)
=>\(x-1\in\left\{0;9;18;27;36;45;54;...\right\}\)
=>\(x\in\left\{1;10;19;28;37;46;55;...\right\}\)
mà 25<x<50
nên \(x\in\left\{28;37;46\right\}\)

a) \(135-\left|9-x\right|=35\)
\(\Leftrightarrow\left|9-x\right|=135-35\)
\(\Leftrightarrow\left|9-x\right|=100\)
\(\Leftrightarrow\orbr{\begin{cases}9-x=-100\\9-x=100\end{cases}}\Leftrightarrow\orbr{\begin{cases}x=109\\x=-92\end{cases}}\)
Vậy ...
b) \(\left|x+2\right|-12=-1\)
\(\Leftrightarrow\left|x+2\right|=-1+12\)
\(\Leftrightarrow\left|x+2\right|=11\)
\(\Leftrightarrow\orbr{\begin{cases}x+2=-11\\x+2=11\end{cases}}\Leftrightarrow\orbr{\begin{cases}x=-13\\x=9\end{cases}}\)
Vậy ...
a,135-\(|9-x|\)=35
<=>\(|9-x|\)=100
<=>9-x=100 hoặc 9-x=-100
<=>x=-91 hoặc x=109
b, \(|x+2|\)-12=-1
<=>\(|x+2|\)=11
<=>x+2=11 hoặc x+2=-11
<=>x=9 hoặc x=-9
X x( 9 - 6) = 135
X x 3 = 135
X = 135 : 3
X =34
Chúc bạn hok tốt
T.I.C.K cho mình nha
135:3= 45 nha bn