Question

( x + 1 ) + ( x + 3 ) + ( x + 5 ) + ... + ( x + 99 ) = 2550

Answer 1

<=> 50x + (1 + 3 + 5 + ....... + 99) = 2550

<=> 50x + 2500 = 2550

=> 50x = 2550 - 2500

=> 50x = 50

=> x = 50 : 50 '

=> x = 1

Answer 2

50x+(1+3+5+...+99)=2550

50x+2500               =2550

50x                        =2550-2500=50

    x                        =50:50=1

vậy x=1

Answer 3

( x + 1 ) + ( x + 3 ) + ( x + 5 ) + ... + ( x + 99 ) = 2550

( x + x + x + ... + x ) + ( 1 + 3 + 5 +... + 99 ) = 2550

 => 50x + ( 1 + 3 + 5 + ... + 99 ) = 2550

=> 50x + 2500 = 2550

=> 50x = 2550 - 2500

=> 50x = 50

x = 50 : 50

x = 1

Vậy x = 1

Answer 4

( x + 1 ) + ( x + 3 ) + ( x + 5 ) + ... + ( x + 99 ) = 2 550

=> ( x + x + x + ... + x ) + ( 1 + 3 + 5 + ... + 99 ) = 2 550

=> x .  50 + 2 500 = 2 550

=> x . 50 = 2 550 - 2 500

=> x . 50 = 50

=> x = 50 : 50

=> x = 1

Vậy x = 1

Answer 5

{ x + 1 } + { x + 3 } + { x + 5 } + ........+ { x + 99 } = 2 550

=> { x + x + x + ......+ x } + { 1 + 3 + 5 + .....+ 99 } = 2 550

=> x. 50 + 2 500 = 2 550 

=> x. 50 = 2 550 - 2 500

=> x = 50 : 50

=> x = 1

Vậy nên x = 1

Answer 6

( x + 1 ) + ( x + 3 ) + ( x + 5 ) + ... + ( x + 99 ) = 2550

<=>(x+x+...+x)+(1+3+...+99)=2550

<=>50x+2500=2550

<=>50x=50

<=>x=1