cherrygirl121
cherrygirl121 cherrygirl121
  • 17-10-2016
  • Mathematics
contestada

What is -3x+5y=-2 2x-2y=1

Respuesta :

kmHart
kmHart kmHart
  • 17-10-2016
-3x + 5y = -2 
2x - 2y = 1

2x = 1 + 2y
x = 1/2 + y

Substitute x into the first equation.
-3(1/2 + y) + 5y = -2
3/2 - 3y + 5y = -2
3/2 + 2y = -2
2y = -2 + 3/2
2y = -1/2
y = (-1/2)/2
y = -1/4

So finish solving for x.
x = 1/2 + y
x = 1/2 - 1/4
x = 1/4

So x = 1/4 and y = -1/4


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ANDIEEE
ANDIEEE ANDIEEE
  • 17-10-2016
-1/4!!!!!!!!!!!!!!!!!!!!!!
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