Question 1087963
{{{n+(n+2)+(n+4)+(n+6)=72}}}


{{{4n+12=72}}}


{{{n+3=(36*2)/4}}}


{{{n+3=(4*9*2)/4}}}


{{{n=18-3}}}


{{{n=15}}}


<pre>The numbers, 15, 17, {{{highlight(19)}}}, 21</pre>