Question

x + ( x + 2 ) + ( x + 4) + ( x + 6 ) +.........+ ( x + 100 ) = 2601

Answer 1

( x . 51 ) + ( 2 + 4 + ... + 100 ) = 2601 

51x + 2550 = 2601 

51x = 2601 - 2550 

51x = 51 

=> x = 1 

Vậy x = 1 

Answer 2

100x+(1+2+3+4+....+100)=2601

100x+[(100-1):1+1]=2061

100x+100=2601

100x+[(100+1).100:2]=2601

100x+5050=2