(x+x+x+x+x+...+x)+(1+3+5+...+99)=0
50x + 2500 = 0
50x=0- 2500
50x =-2500
x=-2500:50
x=-50
Vậy x=-50
a) (x+1) + (x+3) + .... + ( x+99 ) = 0
=x.50 + ( 1+3+ ... +99 ) = 0
=) SSH: (99-1):2+1=50
SC: 50:2=25
TMC: 99+1=100
T: 100.25 = 2500
=) x.50 + 2500 = 0
x.50 = 0-2500 = -2500
x = -2500:50 = - 50
vậy x=-50