melissalau1 melissalau1
  • 03-04-2017
  • Mathematics
contestada

5x-y=6
9x+4y=5
what is the answer to this algebra problem?

Respuesta :

wormynut
wormynut wormynut
  • 03-04-2017
Subtract both the equations by putting the variables at the same spot and multiplying one of the equations both so that you ave at least 1 similar constant
9x-y=6 (Multiply with 4)
5x-4y=5 

36x-4y=24
5x-4y  =5 (Change signs so that one of the variables get cancelled as they 
                  have same constant now)

36x-4y=24
-5x+4y=-5
---------------
31x=19

x=19/31 

Substitute x in equation to get y
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