Respuesta :

dkdiggerboy
12x-3y=21
4x-y=7
I hope this helps

kgreer99
the first one is 21 12 times 3 is 36 minus 3 times 5 is 15 36 minus 15 is 21 
  Next one 4 times 3 is 12 minus 5 is 7 
12x-3y=21
4x-y=7

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