(2+x)+(4+x)+(6+x)+...+(52+x)=780 . x=...?
(2+x)+(4+x)+(6+x)+...........+(52+x)=780
( 2+x ) + (4+x ) + ( 6+x) + ....+ ( 52+x) = 780
[ 2 + x ] + [ 4 + x ] + [ 6 + x ] + ... [ 52 + x ] = 780
( 2+x) + (4+x ) + ( 6+x ) + ......+ ( 52+x ) = 780
tìm x sao cho:(x+2)+(x+4)+(x+6)+...(x+52)=780
(2+x)+(4+x)+(6+x)+...+(52+x)=780
x=
Tìm x để : ( 2 + x ) + ( 4 + x ) + ( 6 + x ) + ... + ( 52 + x ) = 780
{ 2 + x } + { 4 + x } + { 6 + x } +........ + { 52 + x } = 780
x = ?
