x=153

y=54

x – 225 = 364

x = 364 + 225

x = 589

Cần điền vào ô trống lần lượt là dấu + và 589.

\(697:\left(15x+364\right):x=17\)

\(\Leftrightarrow697:\left(15x+364\right)=17x\)

\(\Leftrightarrow697=17x\left(15x+364\right)\)

\(\Leftrightarrow255x^2+6188x-697=0\)

\(\Leftrightarrow nghiem-xau-minh-khong-lam-nhe!\)

(15x+364):x=697:17=41

15x+364=41x

364=41x-15x=26x

x=364: 26=14

\(697:\frac{15\cdot x+364}{x}=17\)

=> \(\frac{15\cdot x+364}{x}=697:17=41\)

=> \(15\cdot x+364=41x\)

=> \(15x+364=41x\)

=> \(364=41x-15x\)

=> \(364=26x\)

=> \(x=364:26=14\)

\(\Rightarrow\frac{15x+364}{x}=697:17=41\)

\(\Rightarrow15+\frac{364}{x}=41\)

\(\frac{364}{x}=41-15=26\)

x = 364 : 26 = 14

\(\frac{15x+364}{x}=697:17=41\)

\(15x+364=41x\)

\(364=41x-15x\)

\(26x=364\)

\(x=364:26=14\)

thiếu đề nha bạn

a ) x : 4 5 + 5 2 = − 3 3 4 ⇒ x : 4 5 = − 3 3 4 − 5 2 ⇒ x : 4 5 = − 11 2 ⇒ x = − 22 5 .

b ) x − 3 4 = 1 5 4 ⇒ x − 3 4 = 9 4     ⇒ x = 3 x − 3 4 = − 9 4 ⇒ x = − 3 2 .

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

\(697:\frac{15x+364}{x}=17\)

=> \(\frac{15x+364}{x}=697:17\)

=> \(\frac{15x+364}{x}=41\)

=> 15x+364=41x

=> 15x-41x+364=0

=> -26x+364=0

=> -26x=-364

=> x=-364:(-26)

=> x=14