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\(\frac{15x+364}{x}\)= 697 : 41 = 17
Thay vào ta có:
\(\frac{15x+364}{x}\)= 17
Từ đây bạn tự làm nhé
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
15x+364= 41x
41x - 15x = 364
26x = 364
X= 364 : 26
X = 14
Tk cho mình nha yêu nhiều! Chúc bạn học tốt!
( 15x + 364 ) : x = 697 : 17
<=> ( 15x + 364 ) : x = 41
<=> 15x + 364 = 41x
<=> 364 = 26x
<=> x = 364 : 26
<=> x = 14
Vậy x = 14
~ Hok tốt ~
![](https://rs.olm.vn/images/avt/0.png?1311)
a, \(\left(2x-4\right)\left(3x+12\right)=0\)
\(\Rightarrow\orbr{\begin{cases}2x-4=0\\3x+12=0\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}2x=4\\3x=-12\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}x=2\\x=-4\end{cases}}\)
b, \(697\div\frac{15x+364}{x}=17\)
\(\Rightarrow\frac{15x+364}{x}=697\div17\)
\(\Rightarrow\left(15x+364\right)\div x=41\)
\(\Rightarrow15x+364=41x\)
\(\Rightarrow15x-41x=-364\)
\(\Rightarrow-26x=-364\)
\(\Rightarrow x=-364\div\left(-26\right)\)
\(\Rightarrow x=14\)
![](https://rs.olm.vn/images/avt/0.png?1311)
697:(15x+364):x=17
=> 15+360:x = 697:17=41
=> 360:x=41-15=26
=> x=360:26=180/13
92.4-27=(x+350):x+315
=> 1+350:x+315=341
=> 350:x = 341 -316=25
-> x=350:25=14
720:(41-(2x-51)=23.5
=> 41-(2x-51)= 720 :40=18
=> 2x=41-18+51=74
=> x=74:2=37
(x+1)+(x+2)+(x+3)+...+(x+100)=5750
=>(x+x+...+x) +(1+2+3+..+99+100)=5750
=> 100.x +(100+1).100:2= 5750
=>100.x= 5750-5050=700
=> x=700:100=7
( L-i-k-e )
697 : (15x + 364) : x = 17
=> 15 + 360 : x = 697 : 17 = 41
=> 360 : x = 41 - 15 = 26
=> x = 360 : 26 = 180/13
92.4 - 27 = (x + 350) : x + 315
=> 1 + 350 : x + 315 = 341
=> 350 : x = 341 - 316 = 25
-> x = 350: 25 = 14
720 : (41 - (2 x - 51) = 23.5
=> 41 - (2 x -51) = 720 : 40 = 18
=> 2x = 41 - 18 + 51 = 74
=> x = 74 : 2 = 37
(x + 1) + (x + 2) + (x + 3) +...+ (x + 100) = 5750
=>(x + x +...+ x) +(1 + 2 + 3 +...+ 99 + 100) = 5750
=> 100.x + (100 + 1).100 : 2 = 5750
=>100.x = 5750 - 5050 = 700
=> x = 700 : 100 = 7
![](https://rs.olm.vn/images/avt/0.png?1311)
\(697:\left(15x+364\right):x=17\)
\(\Leftrightarrow697:\left(15x+364\right)=17x\)
\(\Leftrightarrow697=17x\left(15x+364\right)\)
\(\Leftrightarrow255x^2+6188x-697=0\)
\(\Leftrightarrow nghiem-xau-minh-khong-lam-nhe!\)