(x+1)+(x+4)+(x+7)+(x+10)=62

=>4x+22=62

=>4x=62-22

=>4x=40

=>x=10

t tôi nha bn

x+(1+4+7+10)=62

x+22=62

x=62-22

x=40

( x + 1 ) + ( x + 4 ) + ( x + 7 ) + ( x + 10 ) = 62

4x+ (1+4+7+10)=62

4x+22=62

4x=62-22

4x=40

x=40:4

x=10

\(\left(x+1\right)+\left(x+4\right)+\left(x+7\right)+\left(x+10\right)=62\)

\(\Rightarrow x+1+x+4+x+7+x+10=62\)

\(\Rightarrow4x+22=62\)

\(\Rightarrow4x=40\)

\(\Rightarrow x=10\)

x+(1+4+7+10)=62

x+22=62

x=62-22

x=40

x+x+x+x+x=100⇔5x=100⇔x=100:5=20

\(x\) + \(x\) + \(x\) + \(x\) = 100

\(x\) \(\times\) 1 + \(x\) \(\times\) 1 + \(x\) \(\times\)1 + \(x\) \(\times\) 1 + \(x\) \(\times\) 1 =  100

\(x\) \(\times\) ( 1 + 1 + 1 + 1 + 1 ) = 100

\(x\) \(\times\) 5 = 100

\(x\)       = 100 : 5

\(x\)       = 20

\(x\) + \(x\) + \(x\) + \(x\) \(\times\) 5 = 200

\(x\) \(\times\) 1 + \(x\) \(\times\) 1 + \(x\) \(\times\)1 + \(x\) \(\times\) 5 = 200

\(x\) \(\times\) ( 1 + 1 + 1 + 5) = 200

\(x\) \(\times\)  8 = 200

\(x\)         = 200 : 8

\(x\)         = 25

(\(x\) + 1) + (\(x\) + 4) + ( \(x\) + 7) + (\(x\) + 10) = 62

 \(x\) + 1 + \(x\) + 4 + \(x\)+ 7 + \(x\) + 10 = 62

( \(x\) + \(x\) + \(x\) + \(x\) ) + ( 1 + 4 + 7 + 10) = 62

( \(x\) \(\times\) 1 + \(x\) \(\times\) 1 + \(x\) \(\times\) 1 + \(x\) \(\times\) 1) + 22 = 62

\(x\) \(\times\) ( 1 + 1 + 1 + 1)  + 22 = 62

\(x\)  \(\times\) 4 + 22 = 62

\(x\) \(\times\) 4 = 62 - 22

\(x\) \(\times\) 4 = 40

\(x\)         = 40 : 4

\(x\)         = 10

$x$ + $x$ + $x$ + $x$ = 100

$x$ $\times$ 1 + $x$ $\times$ 1 + $x$ $\times$1 + $x$ $\times$ 1 + $x$ $\times$ 1 =  100

$x$ $\times$ ( 1 + 1 + 1 + 1 + 1 ) = 100

$x$ $\times$ 5 = 100

$x$       = 100 : 5

$x$       = 20

$x$ + $x$ + $x$ + $x$ $\times$ 5 = 200

$x$ $\times$ 1 + $x$ $\times$ 1 + $x$ $\times$1 + $x$ $\times$ 5 = 200

$x$ $\times$ ( 1 + 1 + 1 + 5) = 200

$x$ $\times$  8 = 200

$x$         = 200 : 8

$x$         = 25

($x$ + 1) + ($x$ + 4) + ( $x$ + 7) + ($x$ + 10) = 62

 $x$ + 1 + $x$ + 4 + $x$+ 7 + $x$ + 10 = 62

( $x$ + $x$ + $x$ + $x$ ) + ( 1 + 4 + 7 + 10) = 62

( $x$ $\times$ 1 + $x$ $\times$ 1 + $x$ $\times$ 1 + $x$ $\times$ 1) + 22 = 62

$x$ $\times$ ( 1 + 1 + 1 + 1)  + 22 = 62

$x$  $\times$ 4 + 22 = 62

$x$ $\times$ 4 = 62 - 22

$x$ $\times$ 4 = 40

$x$         = 40 : 4

$x$         = 10

( x + 1 ) + ( x + 4 ) + ( x + 7 ) + ( x + 10 ) = 62

( x + x + x + x ) + ( 1 + 4 + 7 + 10 ) = 62

4x + 22 = 62

4x = 62 - 22

4x = 40

  x = 40 : 4

  x = 10

( x + 1 ) + ( x + 4 ) + ( x + 7 ) + ( x + 10 ) = 62

( x + x + x + x ) + ( 1 + 4 + 7 + 10 )          = 62

 x * 4 +                           22                      =   62

 x * 4                                                       =  62 - 22

x * 4                                                        =     40

x                                                             =  40 : 4 

 x                                                           = 10    

4x+22=62

4x=40

x=10

a)   x² + x = 0

=>   x( x+ 1 ) = 0

=>  x  = 0 

hoặc x = -1 

b)  b, (x-1)^x+2 = (x-1)^x+4

=>  x + 2    =   x  + 4 

=> 0x = 2 ( ktm)

Vậy ko có giá trị x nào thoả mãn đk 

d) Ta có: x-1/x+5 = 6/7

=>(x-1).7 = (x+5).6

=>7x-7 = 6x+ 30

=> 7x-6x = 7+30

=> x = 37

Vậy x = 37

e, x²/ 6= 24/25

=>  x²  . 25 = 6 . 24

 ⇒${}^{}.25=144$

$\Rightarrow {}^{}=144÷25$

$\Rightarrow {}^{}=5,76=2,{}^{}=\left(-2,{}^{}\right)$

$\Rightarrow x\in \left\{2,4;-2,4\right\}$

Vậy $x\in \left\{2,4;-2,4\right\}$

g, x-2/ x-1= x+4/ x+7

$\iff \left(x-2\right)\times \left(x+7\right)=\left(x+4\right)\times \left(x-1\right)$

$\iff {}^{}+7x-2x-14={}^{}-x+4x-4$

$\iff {}^{}-{}^{}+7x-2x+x-4x-14+4=0$

$\iff$$2x-10=0$

$\Rightarrow x=5$

a) x=7 và 8

b) x+1 và 2

c) 1/4

Quên rùi!!!

<=> \(\frac{1.2.3....31}{4.6.8....64}=2^n\Rightarrow\frac{1.2.3....30.31}{2\left(2.3.4.5...31\right).32}=2^n\Leftrightarrow\frac{1}{2.32}=2^n\Leftrightarrow\frac{1}{2^6}=2^n\)

=> 2^6.2^n = 1 

=> 2^ (n + 6 ) = 2^0

=> n+ 6  = 0 

=> n = - 6 

\(\frac{1}{4}.\frac{2}{6}.\frac{3}{8}....\frac{31}{64}=\frac{1.2.3....31}{4.6.8....64}=\frac{1.2.3....31}{2.3.2.4....2.32}=\frac{1.2.3....31}{2^{30}.\left(3.4....32\right)}=\frac{2}{2^{30}.32}=\frac{1}{2^{34}}=2^{-34}=2^n=>n=-34\)

2^n × 2³¹ = \(\dfrac{ }{ }\)2/4×4/6×6/8×...×62/64

2^n×2³¹=1/32=2^-5

2^n=2^-5 ÷ 2³¹=2^-36

=>n=-36