lê tiến trường

\(\left|x-564\right|=532\)

\(\Rightarrow\left[{}\begin{matrix}x-564=532\\x-564=-532\end{matrix}\right.\)

\(\Rightarrow\left[{}\begin{matrix}x=532+564=1096\\x=\left(-532\right)+564=32\end{matrix}\right.\)

Vậy x = 1096 và x = 32

Linh Nguyễn

a, Where do your family and you live?

b, What is your mother job?

c, How far is it from your house to the movie theater?

d, When do we have math a nd literature?

e, How do people often feel in hot weather?

f, Where do all the students in class 7A3 come from?

nguyễn ly

Tìm x:

\(\left|2x-4\right|+1=5\)

\(\Rightarrow\left|2x-4\right|=4\)

\(\Rightarrow\left[{}\begin{matrix}2x-4=4\\2x-4=-4\end{matrix}\right.\)

\(\Rightarrow\left[{}\begin{matrix}2x=4+4\Rightarrow2x=8\Rightarrow x=\dfrac{8}{2}=4\\2x=\left(-4\right)+4\Rightarrow2x=0\Rightarrow x=0\end{matrix}\right.\)

Vậy x = 4 và x = 0

A . because 

tick mk nha bạn 

Đức Đạt Đỗ (Đạt 301 Channel)

Tìm x:

5 + 3^x+1 = 86

3^x+1 = 86 -5

3^x+1 = 81

3^x+1 = 3⁴

x+1 = 4

x = 4 -1

x = 3

Vậy x = 3

Nguyen Tran Ngoc Diep

( 7²⁰¹⁰ + 7²⁰⁰⁹ ) : 7²⁰⁰⁸

= (7²⁰¹⁰ : 7²⁰⁰⁸ )+ (7²⁰⁰⁹ : 7²⁰⁰⁸ )

= ( 7^2010-2008) + ( 7^2009-2008 )

= 7² + 7¹

= 49 + 7

= 56

bút chì cô bé

9⁶ : 9² = 9^6-2 = 9⁴

\(x^2-0,25=0\)

\(\Leftrightarrow x^2-0,5^2=0\)

\(\Leftrightarrow x-0,5=0\)

\(\Leftrightarrow x=0+0,5\)

\(\Leftrightarrow x=0,5\)

b.

\(\dfrac{8}{2x}=2\Leftrightarrow2x=\dfrac{8}{2}\Rightarrow x=4:2=2\)

c.

\(\left(2x-1\right)^3=8\)

\(\Rightarrow\left(2x-1\right)^3=2^3\)

\(\Rightarrow2x-1=2\)

\(\Rightarrow2x=2+1\)

\(\Rightarrow2x=3\)

\(\Rightarrow x=\dfrac{3}{2}\)

d.

\(\left(x-2\right)^2=16\)
\(\Rightarrow\left(x-2\right)^2=4^2\)

\(\Rightarrow x-2=4\)

\(\Rightarrow x=4+2\)

\(\Rightarrow x=6\)

Chúc bạn học tốt!!!!

a.

\(\dfrac{x}{13}=\dfrac{35}{91}\)

\(\Rightarrow x=\dfrac{35.13}{91}=5\)

Vậy x = 5

b.

\(\dfrac{9+x}{13-x}=\dfrac{5}{6}\)

\(\Rightarrow\dfrac{9+x}{13-x}=\dfrac{10}{12}\)

\(\Rightarrow\dfrac{x=10-9}{13-12=x}\Rightarrow x=\dfrac{1}{1}=1\)

Vậy x =1

c.

x + x : 5 . 7,5 + x : 2.9 = 315

\(\Rightarrow x+\dfrac{x}{5}7,5+\dfrac{x}{2}9=7x\)

\(\Rightarrow7x=3^3.5\)

\(\Rightarrow7x=135\)

\(\Rightarrow x=\dfrac{135}{7}\)

Vậy x = \(\dfrac{135}{7}\)

Chúc bạn học tốt!!!

tui nè 99/99 luôn hii