Question 329368
1.{{{8m + n = 32}}}
2.{{{m - 2n = 21}}}
From eq. 1,
{{{n=32-8m}}}
Substitute into eq. 2,
{{{m-2(32-8m)=21}}}
{{{m-64+16m=21}}}
{{{17m=85}}} 
{{{highlight(m=5)}}}
Then from above,
{{{n=32-40}}}
{{{highlight(n=-8)}}}