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-3x+1y=-4
despejas x en ambas:
x=2-2y/4
x=-4-1y/-3
Igualas ambas ecuaciones
2-2y/4=-4-1y/-3
despejas y:
-3(2-2y)=4(-4-1y)
-6+6y=-16-4y
6y+4y=-16+6
10y=-10
y=-10/10
y=-1
sustituyes la y en una ecuacion donde este la x despejada:
x=2-2y/4
x=2-2(-1)/4
x=2+2/4
x=4/4
x=1
entonces:
x=1
y= -1
(3) 4X+2Y=2
(4) -3X+Y=-4
12X+6Y =6
-12X+4Y =-16
______________
////// 10Y=-10
Y=-1
REEMPLAZAMOS
EL Y-1 ASI
4X+2(-1)=2
4X=2+2
X=1
SERIA
Y=-1
X=1