brittany41
brittany41
14-03-2017
Mathematics
contestada
i need help solving for x,y and z
Respuesta :
TheHero
TheHero
08-04-2017
y = -2x
sub in the other 2
x +2x + z = 6
3x + z = 6 ->(1)
2x -4x - z = 3
-2x - z = 3 -> (2)
sum them
x = 9
y = -2x = -18
z = -2x - 3 = -18 -3 = -21
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