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3X + 2(-X + 2) = 0
3X + (-2X) + 4 = 0
3X - 2X + 4 = 0
X + 4 = 0
X = -4
Ordenamos las ecuaciones.
1) 3x 2y = 0
2) x + y = 2
Despejo x en 2.
x + y = 2
x = 2 - y
Sustituyo x en 1.
3x + 2y = 0
3 (2 - y) + 2y = 0
6 - 3y + 2y = 0
- y = - 6
y = 6
Sustituyo y = 6 en el despeje de x.
x = 2 - y
x = 2 - 6
x = - 4
Solución :
x = - 4
y = 6