Question 1123696
{{{system(x, x+2, x+4, x+6)}}}


{{{-2(x+x+6)=-(x+4)-20}}}------the basic equation corresponding to the description.



-

{{{-2(2x+6)=-x-4-20}}}
{{{2(2x+6)=x+24}}}
{{{4x+12=x+24}}}
{{{3x=12}}}
{{{highlight_green(x=4)}}}--------the first even integer