carloseontiveros carloseontiveros
  • 22-06-2017
  • Mathematics
contestada

find the solution of this system of equations. seprate the x- and y- valuess with a comma.
x=-4+y
-2x-5y=15

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KWDG1
KWDG1 KWDG1
  • 22-06-2017
( x , y ) = ( -5 , -1 )


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ghanami
ghanami ghanami
  • 22-06-2017
hello : 
x=-4+y ...(1)
-2x-5y=15....(2)
subct in (2) :
-2(-4+y)-5y = 15
8-2y-5y = 15
-7y = 7
y = -1
in (1) : x = -4+(-1) 
x= -5
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