75:(x-8)=5

x-8       = 75:5

x-8       =15

x           = 15+8

x           =23

75/(x-8)=5

=> x-8=75:5

=> x-8=15

=> x=15+8

=> x=23

nhanh lên

kb vs mk i rùi mk trả lời cho

ĐỐ BT TUI LÀ CON TRAI HAY GIRL

GỢI Ý .SỬ DỤNG CÔNG THỨC.

/A/+/B/=/A+B/

/A/-/B/=/A-B/

K CHO MK ĐI.MK ĐG SUY NGHĨ SẮP LÀM ĐC R

44496

44496 em k giùm chị đi

3708 x 12 = 4496 nha

TL 

18448155

HT 

K CHO MIK NHA

1844815

16/15 x 25/24 x 36/35 x.........x 10000/9999

=16 x 25 x 36......10000 / 15 x 24 x35 .....9999

= ( 4 x 4 ) x ( 5 x 5 ) x ( 6 x 6 ).........( 100 x 100 ) / ( 3 x 5 ) x ( 4 x 6 ) x ( 5 x 7 ) ........( 99 x 101 )

= ( 4 x 5 x 6 x..........100 ) x ( 4 x 5 x 6 ........... x100) / ( 3 x 4 x 5 x 99 ) x ( 5 x 6 x 7.........x 101 )

= 100 x 4 / 3 x 101

= 400/ 303

Hãy k cho mình nha

Bằng 80000/69993

Mình ko chắc nữa số hơi to ( nếu đúng k cho mình nha ✔  

kết quả là 100/3*4*101

\(5^{x+2}+5^x=650\)

\(\Rightarrow5^x\cdot5^2+5^x=650\)

\(\Rightarrow5^x\left(5^2+1\right)=650\)

\(\Rightarrow5^x\cdot26=650\)

\(\Rightarrow5^x=25=5^2\)

\(\Rightarrow x=2\)

Vậy x = 2 thì \(5^{x+2}+5^x=650\)

\(5^{x+2}+5^x=650\\ \Rightarrow5^x.25+5^x=650\\ \Rightarrow5^x\left(25+1\right)=650\\ \Rightarrow5^x.26=650\\ \Rightarrow5^x=25\\ \Rightarrow5^x=5^2\\ \Rightarrow x=2\)

\(5^{x+2}+5^x=650\)

\(5^x\cdot5^2+5^x=650\)

\(5^x\cdot25+5^x\cdot1=650\)

\(5^x\cdot\left(25+1\right)=650\)

\(5^x\cdot26=650\)

\(5^x=\frac{650}{26}\)

\(5^x=25\)

\(x=2\)

mong bạn k cho mình

a) 5 . x + x = 39 - 177147 : 19683                                                                              b) |x - 4| = 12 + (- 5)

   5 . x + x = 39 - 9                                                                                                       |x - 4| = 12 - 5

   5 . x + x = 30                                                                                                            |x - 4| = 7

         6 . x = 30                                                                                TH1: x - 4 = - 7                                    TH2: x - 4 = 7

              x = 30 : 6                                                                                        x = - 7 + 4                                          x = 7 + 4

              x = 5                                                                                               x = - 3                                                x = 11

\(16.4x=48\)

\(\Rightarrow4x=\frac{48}{16}\)

\(\Rightarrow4x=3\)

\(\Rightarrow x=\frac{3}{4}\)

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

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

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

\(\Rightarrow\orbr{\begin{cases}x-2=-4\\x-2=4\end{cases}}\)

\(\text{* Trường hợp : }x-2=-4\)

\(\Rightarrow x=-4+2\)

\(\Rightarrow x=-2\)

\(\text{* Trường hợp : }x-2=4\)

\(\Rightarrow x=4+2\)

\(\Rightarrow x=6\)

\(\text{Vậy }x\in\left\{-2;6\right\}\)

b)

|x-2|+1=5

|x-2|=5-1

|x-2|=4

=> x-2=4 hoặc x-2=-4

Xét:
x-2=4

x=4+2

x=6

Xét:

x-2=-4

x=-4+2

x=-2

          Vậy x=6 hoặc x=-2