Respuesta:
Explicación paso a paso:
(lo sumas las 2
ecuaciones)
a) 2x +5y=16 2x +5y=16 2x-2x+5y-6y=16-12
(x + 3y =6) .(-2) -2x -6y = -12 -y=4.........y= -4 v x=18
b) x-3y = 10 x-3y=10 x+2x-3y+3y=10-2
(-2x-3y=2) .(-1) 2x+3y=-2 3x=8 ..............x=8/3 v y= -22/9
c) 3x+9y=4 3x+9y=4 3x+18x+9y-9y=22
(2x-y=2).(9) 18x-9y=18 21x=22.........x=22/21 v y=2/21
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Respuesta:
Explicación paso a paso:
(lo sumas las 2
ecuaciones)
a) 2x +5y=16 2x +5y=16 2x-2x+5y-6y=16-12
(x + 3y =6) .(-2) -2x -6y = -12 -y=4.........y= -4 v x=18
b) x-3y = 10 x-3y=10 x+2x-3y+3y=10-2
(-2x-3y=2) .(-1) 2x+3y=-2 3x=8 ..............x=8/3 v y= -22/9
c) 3x+9y=4 3x+9y=4 3x+18x+9y-9y=22
(2x-y=2).(9) 18x-9y=18 21x=22.........x=22/21 v y=2/21