Question

tìm x

(x+2)+(x+4)+(x+6)+...+(x+100)=2700

Answer 1

=> ( x + x + x + .... + x ) + ( 2 + 4 + 6 + ..... + 100 ) = 2700

=> 50x + 2.( 1 + 2 + 3 + .... + 50 ) = 2700

=> 50x + 2.{ [ 50.( 50 + 1 ) ] : 2 } = 2700

=> 50x + 2.1275 = 2700

=> 50x + 2550 = 2700

=> 50x = 2700 - 2550 = 150

=> x = 150 : 50 = 3

Vậy x = 3

Answer 2

x + 2 + x + 4 + x + 6 +...+ x + 100 = 2700

50x + 2 + 4 + 6 +...+ 100 = 2700

50x + (100 + 2) x 50 : 2 = 2700

50x + 2550 = 2700

50x = 2700 - 2550 

x = 150 : 50

x = 3

Answer 3

<=> 50x + ( 2 + 4 + 6 +.... +100) = 2700

<=> 50x + 2550 = 2700

<=> 50x = 2700 - 2550 

<=> 50x = 150

=> x = 150 : 50 = 3

Vậy x = 3

Answer 4

lm người yêu mik nha

Answer 5

(x+2)+(x+4)+(x+6)+...+(x+100)=2700 

50x + (2+4+6+8+10+...+100) = 2700 

50x + 2550 = 2700 

50x=2700-2550=150 

x=150:50

x=3 

Answer 6

( x + 2 ) + ( x + 4 ) + ( x + 6 ) + ... + ( x + 100 ) = 2700

=> ( x + x + x + ... + x ) + ( 2 + 4 + 6 + ... + 100 ) = 2700

          50 số x

=> 50 x X + 2550 = 2700

=> 50 x X = 2700 - 2550

=> 50 x X = 150

=> x = 150 : 50

=> x = 3

Chúc bạn học tốt nha !!!

Answer 7

=> ( x + x + x + .... + x ) + ( 2 + 4 + 6 + ..... + 100 ) = 2700

=> 50x + 2.( 1 + 2 + 3 + .... + 50 ) = 2700

=> 50x + 2.{ [ 50.( 50 + 1 ) ] : 2 } = 2700

=> 50x + 2.1275 = 2700

=> 50x + 2550 = 2700

=> 50x = 2700 - 2550 = 150

=> x = 150 : 50 = 3

Vậy x = 3

Answer 8

x= 3 đấy tớ nói không sai 

Answer 9

(x+2)+(x+4)+(x+6)+...+(x+100)=2700

(x+x+x+...+x+x)+(2+4+6+...+100)=2700

    50*x              +        2550        = 2700

50*x=2700-2550

50*x=   150

x=150:50

x=3

Answer 10

ta co :(x+2)+(x+4)+(x+6)+...+(x+100)=2700

         (x+x+x+...+x)+(2+4+6+...+100)=2700

               nhom1             nhom 2      

xet: 2+4+6+...+100

day la day so cach deu 2 don vi

so so hang la:

      (100-2):2+1=50(so hang )

tong la: 

        (100+2) x 50:2=2550

ta thay so so hang cua nhom 1 bang so so hang cua nhom 2 va bang 510 so hang

=>X x 50+2550=2700

 X x 50=150

 =>x=3

Answer 11

(x+2)+(x+4)+(x+6)+...+(x+100)=2700

x+2+x+4+x+6+...+x+100=2700

(x+x+x+...+x)+(2+4+6+...+100)=2700

50x + 2550 = 2700

x = (2700-2550)/50

x=3

x=

Answer 12

(x+2)+(x+4)+...+(x+100)=2700

(x+x+x+...+x)+(2+4+6+...+100)=2700

x+x+x+...+x=x.{(100-2):2+1}=x.50

2+4+...+100=\(\frac{\left(100-2\right):2+1}{2}\)X(100+2)=25.102=2550

ta có:50x+2550=2700

       50x=2700-2550

       50x=150

       x=150:50=3

Answer 13

x + 2 + x + 4 + ........ + x + 100 = 2700

50x + 2550 = 2700

50x=  2700 - 2550

50x = 150

x = 3 

Answer 14

x=3 phải ko vậy

Answer 15

(x+2)+(x+4)+(x+6)+...+(x+100)=2700 

50x + (2+4+6+8+10+...+100) = 2700 

50x + 2550 = 2700 

50x=2700-2550=150 

x=150:50

x=3 

Answer 16

x + 2 + x + 4 + ........ + x + 100 = 2700
50x + 2550 = 2700
50x=  2700 - 2550
50x = 150
x = 3