amtee amtee
  • 01-12-2014
  • Mathematics
contestada

substitution method-
r = -3s
r= 10 - 4s

Respuesta :

luana
luana luana
  • 01-12-2014
[tex]r=-3s\\r=10-4s\\\\-3s=10-4s\ \ \ \ |add\ 4s\\-3s+4s=10\\s=10\\\\r=-3\cdot10=-30[/tex]
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