8m+n=12 m-5n=22 solve using substitution method
well, from the fist equation
n=12-8m
Putting that into the second
12m-5(12-8m)=22
solve for m. Then, put it into the first equation and solve or n
n=12-8m
Putting that into the second
12m-5(12-8m)=22
solve for m. Then, put it into the first equation and solve or n