Question 442528
Let's solve for m.  

Then m = 46+9n, using the 2nd equation.

Take 46+9n and place it where you see m in the 1st equation:

8(46+9n) + n = 3

Distribute.

368 + 72n +n = 3

73n = -365
n = -365/73
{{{n = -5}}}

Take n = -5 and plug it back into either ORIGINAL equation.

Let's put it back into the first.

Then:8m - 5 = 3

8m = 8

m = 8/8

{{{m =1}}}

So our solution is (1,-5)  or {{{m=1}}}{{{n=-5}}}