(x+2 ) + (x+4 ) + ...+ (x+1996) = 998000
(x+x+x+...+x) + (2+4+...+1996) = 998000
998x + \(\frac{\left(1996+2\right).998}{2}\) = 998000
998x + 997002 = 998000
998x = 998000 - 997002
998x=998
x= 998:998
x=1
(x+2)+(x+4)+......+(x+1996)=998000
998*x+(2+4+.....+1996) =998000
998*x+997002 =998000
998*x =998000-997002
998*x =998
x =998/998
x =1
Vậy x=1
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