sophiagmoser
sophiagmoser sophiagmoser
  • 23-02-2018
  • Mathematics
contestada

Their sum is −11 and their difference is 41


I NEED HELP, I WILL MARK THE RIGHT ANSWER AS BRAINLIEST!!!!!



Respuesta :

dannielle
dannielle dannielle
  • 23-02-2018
x+y=-11,  y= -11 -x
x-y=41
---------
2x = 41 - 11 = 30
x=30:2
x=15

y= -11-x
y=-11-15
y= -26
Answer Link
catsanford16
catsanford16 catsanford16
  • 23-02-2018
x+y=-11      x-y=41             equations for the two number
x=-11-y     (-11-y)-y=41       separate x, then plug it into the other equation
                 -y-y=41+11         solve for y
                   -2y=52
                     y=-26       x=-11-(-26)  plug y into the equation for x 
                                       x=15

Answer Link

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