Question

( x + 1 ) + ( x + 2 ) + ........ + ( x + 10 ) = 165

Jup mình nhanh bài này vs

Answer 1

( x + 1 ) + ( x + 2 ) + ... + ( x + 10 ) = 165

( x + x + ... + x ) + ( 1 + 2 + ... + 10 ) = 165

10x = 165 - 55

10x = 110

x = 110 : 10

x 11

Answer 2

\(x=3\)

Answer 3

<=> x + 1 + x + 2 +......+ x + 10 = 165

<=> 10x + (1+2+....+10) = 165

<=> 10x + 65 = 165 

<=> 10x = 165 - 65 = 100

<=> x = 10

Answer 4

( x + 1 ) + ( x + 2 ) + ..... + ( x + 10 ) = 165

x + 1 + x + 2 + ..... + x + 10 = 165

( x + x + ....+ x ) + ( 1 + 2 + ... + 10 ) = 165

10x + 55 = 165

10x = 165 - 55 = 110

x = 110 : 10 = 11

Vậy x = 11

Answer 5

( x + x + .......... + x ) + ( 1 + 2 + ......... + 10 ) = 165

X x 10 + 55 = 165

X x 10 = 165 - 55

X x 10 = 110

       X  = 110 : 10

       X = 11

Answer 6

Ak thiếu a=11 mới đúng

Answer 7

Nhầm rùi bạn ơi từ chỗ 10x + (1+2+....+10) = 165 

<=> 10x + 55 = 165 

<=>10x = 165 - 55 =110

<=> x= 11

Answer 8

\(\left(x+1\right)+\left(x+2\right)+...+\left(x+10\right)=165\)

\(\Leftrightarrow\left(x+x+...+x\right)+\left(1+2+...+10\right)=165\)

\(\Leftrightarrow10x+55=165\)

\(\Leftrightarrow10x=165-55\)

\(\Leftrightarrow10x=110\)

\(\Leftrightarrow x=110\div10\)

\(\Leftrightarrow x=11\)

Vậy x = 11

Answer 9

(x+1)+(x+2)+......+(x+10) = 165

=>10x + (1+2+....+10)     = 165

=>10x+55                      = 165

=>10x                           = 110

=> x                              = 110/10 =11

Answer 10

ta có:

(x+1)+(x+2)+..+(x+10)  = 165

= (x+x+..+x)+(1+2+..+10) = 165

= 10x   +   55  = 165

=> 10x           = 165 -55 = 110

       x             = 110 : 10 = 11

Answer 11

[x+1]+[x+2]+.....+[x+10]=165=x+1+x+2+....+x+10=165=[x.10]+[1+2+3+4+5+6+7+8+9+10]=[x.10]+55=165=x.10=110                                      X=11

Answer 12

 ( x + 1 ) + ( x + 2 ) + ... + (x  + 10 ) = 165 

 ( x + x + ... + x ) + ( 1 + 2 + ... + 10 ) = 165 

 10x + 55                                          = 165 

  10x                                                 = 165 - 55

   10x                                                = 110

       x                                                = 110: 10 

       x                                                = 11

Vậy...