# SOLUTION: Solve by the substitution method 8m + n = 5 m - 9n = 28

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 Click here to see ALL problems on Linear-systems Question 327889: Solve by the substitution method 8m + n = 5 m - 9n = 28Answer by mananth(12270)   (Show Source): You can put this solution on YOUR website!8m + n = 5 m - 9n = 28 n = 5-8m plug the value of n in the equation below m - 9n = 28 m-9(5-8m)=28 m-45+72m=28 73m-45=28 add 45 to both sides-m-45+45=28+45 73m=73 m=1 plug the value of m in the equation n=5-8m n=5-8 n=-3