rodriguez1414 rodriguez1414
  • 09-01-2015
  • Mathematics
contestada

Solve by the elimination method.
6x+9y=57
-6x+y=33

Respuesta :

eu99li
eu99li eu99li
  • 16-01-2015

6x+9y=57
-6x+y=33

------------------  (+)

6x+(-6x)+9y+y=57+33

10y=90   /:10

y=9

-6x+y=33

-6x+9=33  /-9

-6x=24   /:(-6)

x=-4

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