Tìm x biết: 697 : \(\frac{15\times a+364}{a}\) = 17
tìm x thuộc N biết ; 697:\(\frac{15.x+364}{x}\)=17
Tìm số tự nhiên a, biết rằng:
\(697 : \frac{15\;.\;a + 364}{a} = 17\)
\(697:\frac{15a+364}{a}=17\)
\(\Leftrightarrow\frac{15a+364}{a}=41\Leftrightarrow15a+364=41a\Leftrightarrow15a-41a=-364\Leftrightarrow-26a=-364\Leftrightarrow a=14\)
tìm x biết \(697:\frac{15.x+364}{x}=17\)
\(697:\frac{15\cdot x+364}{x}=17\)
=> \(\frac{15\cdot x+364}{x}=697:17=41\)
=> \(15\cdot x+364=41x\)
=> \(15x+364=41x\)
=> \(364=41x-15x\)
=> \(364=26x\)
=> \(x=364:26=14\)
\(\Rightarrow\frac{15x+364}{x}=697:17=41\)
\(\Rightarrow15+\frac{364}{x}=41\)
\(\frac{364}{x}=41-15=26\)
x = 364 : 26 = 14
\(\frac{15x+364}{x}=697:17=41\)
\(15x+364=41x\)
\(364=41x-15x\)
\(26x=364\)
\(x=364:26=14\)
Tìm x biết :
697 : \(\frac{15.x+364}{x}\)=17
\(697:\frac{15x+364}{x}=17\)
=> \(\frac{15x+364}{x}=697:17\)
=> \(\frac{15x+364}{x}=41\)
=> 15x+364=41x
=> 15x-41x+364=0
=> -26x+364=0
=> -26x=-364
=> x=-364:(-26)
=> x=14
tìm x
\(697:\frac{15.x+364}{X}=17\)
1.Tìm số tự nhiên a biết:
697:\(\frac{15.a+364}{a}\)=17
*GIẢI GIÚP MÌNH NHÉ CẢM ƠN CÁC BẠN
15.a+367/a = 697 : 17
15.a+367/a = 41
chia tử và mẫu với a
15 + 367/a = 41
367/a = 41-15
367/a = 26
a = 367 : 26
a= ( tự tính )
Tìm x,biết:
a)x . (2013 + 2014 + 2015) = 0
b) x . 125 = 10000
c)697 : [(15 . x + 364) : x] = 17
Trả lời:
a, x . ( 2013 + 2014 + 2015 ) = 0
=> x = 0 : ( 2013 + 2014 + 2015 )
=> x = 0
Vậy x = 0
b, x . 125 = 10000
=> x = 10000 : 125
=> x = 80
Vậy x = 80
c, 697 : [ ( 15 . x + 364 ) : x ] = 17
=> ( 15 . x + 364 ) : x = 697 : 17
=> ( 15 . x + 364 ) : x = 41
=> 15 . x + 364 = 41 . x
=> 41 . x - 15 . x = 364
=> ( 41 - 15 ) . x = 364
=> 26 . x = 364
=> x = 364 : 26
=> x = 14
Vậy x = 14
Tìm x:
697:\(\frac{15.x+364}{x}\)=17
\(=>\frac{15.x+364}{x}=697:17\)
\(=>\frac{15.x}{x}+\frac{364}{x}=41\)
\(=>15+\frac{364}{x}=41\)
\(=>\frac{364}{x}=41-15\)
\(=>\frac{364}{x}=26\)
\(=>x=364:26\)
\(=>x=14\)
\(\Rightarrow\frac{15.x+364}{x}=697:17\)
\(\Rightarrow\frac{15.x+364}{x}=41\)
\(\Rightarrow15.x+364=41.x\)
\(\Rightarrow364=26.x\)
\(\Rightarrow x=14\)
Tìm x biết:
a) (2x-4).(3x+12)=0
b) 697:\(\frac{15x+364}{x}\)=17
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, \(697\div\frac{15x+364}{x}=17\)
\(\Rightarrow\frac{15x+364}{x}=697\div17\)
\(\Rightarrow\left(15x+364\right)\div x=41\)
\(\Rightarrow15x+364=41x\)
\(\Rightarrow15x-41x=-364\)
\(\Rightarrow-26x=-364\)
\(\Rightarrow x=-364\div\left(-26\right)\)
\(\Rightarrow x=14\)