Question

13x(7-x)=26                             (4x-18):3=2                         2xx+98x2022=98x2023                        (x+1)+(X+3)+(X+5)+.....+(X+101)                     

Answer 1

a) \(13\cdot\left(7-x\right)=26\)

\(\Rightarrow7-x=\dfrac{26}{13}\)

\(\Rightarrow7-x=2\)

\(\Rightarrow x=7-2\)

\(\Rightarrow x=5\)

b) \(\left(4x-18\right):3=2\)

\(\Rightarrow4x-18=2\cdot3\)

\(\Rightarrow4x-18=6\)

\(\Rightarrow4x=6+18\)

\(\Rightarrow4x=24\)

\(\Rightarrow x=24:4\)

\(\Rightarrow x=6\)

c) \(2\cdot x+98\cdot2022=98\cdot2023\)

\(\Rightarrow2\cdot x=98\cdot2023-98\cdot2022\)

\(\Rightarrow2\cdot x=98\cdot\left(2023-2022\right)\)

\(\Rightarrow2\cdot x=98\cdot1\)

\(\Rightarrow x=\dfrac{98}{2}\)

\(\Rightarrow x=49\)

d) \(\left(x+1\right)+\left(x+3\right)+\left(x+5\right)+...+\left(x+101\right)=?\)

Thiếu đề 

Answer 2

a) \(13.\left(7-x\right)=26\)

\(7-x=26:13\)

\(7-x=2\)

\(x=7-2\)

\(x=5\)

b) \(\left(4x-18\right):3=2\)

\(4x-18=6\)

\(4x=6+18\)

\(4x=24\)

\(x=24:4\)

\(x=6\)

Answer 3

Thành thiếu kìa bn

Answer 4

c) \(2x+98.2022=98.2023\)

\(\Rightarrow2x=98.2023-98.2022\)

\(\Rightarrow2x=98.\left(2023-2022\right)\)

\(\Rightarrow2x=98.1\)

\(\Rightarrow2x=98\)

\(\Rightarrow x=98:2=49\)

Câu d bạn xem lại đề

Answer 5

a) $13\; :\left(7-x\right)=26$

2⋅�+98⋅2022=98⋅2023

$7-x=26:13$

$7-x=2$

$x=7-2$

 

$x=5$

b) $\left(4x-18\right):3=2$

$4x-18=6$

$4x=6+18$

$4x=24$

$x=24:4$

$x=6$

c) 2⋅x+98⋅2022=98⋅2023

$=2\cdot x=98\cdot 2023-98\cdot 2022$

$=2\cdot x=98\cdot \left(2023-2022\right)$

$=2\cdot x=98\cdot 1$

⇒�=982x=298​

⇒�=49Câu d bạn xem lại đề nhé ( tik cho mik nhé )

7−�=26:13