Alejandra22
Alejandra22 Alejandra22
  • 12-10-2016
  • Mathematics
contestada

y=-7x+9
5x-y=15
What is the substitution?

Respuesta :

TTH7
TTH7 TTH7
  • 12-10-2016
5x-y=15
÷by 5× on both sides
-y=3x
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