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Solve 7m+2n=21 and 10m+4n=-10 with substitution
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Solve 7m+2n=21 and 10m+4n=-10 with substitution

User Dwhite
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I hope this helps you



10m+4n= -10


5m+2n= -5


-5m-2n= 5



7m+2n-5m-2n= 21+5


5m=26 m= 26/5


5.26/5+2n= -5


26+2n= -5


2n= -31


n= -31/2
User Dingle
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