SOLUTION: Solve the system of equations in Problem 7m + 12n = -1 5m – 3n = 7

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Question 943783: Solve the system of equations in Problem


7m + 12n = -1
5m – 3n = 7

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

7m+%2B+12n+=+-1
5m+-3n+=+7....all terms multiply by 4
---------------------------
7m+%2B+12n+=+-1
20m+-12n+=+28
---------------------add
7m+%2B+12n%2B20m+-12n+=+-1%2B28
7m+%2B20m++=27
27m++=27
highlight%28m++=1%29
go to 7m+%2B+12n+=+-1, substitute m=+1
7%2A1+%2B+12n+=+-1
7+%2B+12n+=+-1
12n+=+-1-7
12n+=+-8
n+=+-8%2F12
highlight%28n+=+-2%2F3%29