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2 ... 2x + 4y =10
Se multiplicara por (-2) a toda la ecuación 1
- 2x - 2y = -8
2x + 4y = 10
-----------------
0 +2y = 2
y = 2/2
y = 1
HALLANDO "X"
X + Y = 4
X + 1 = 4
X = 4-1
X= 3
COMPROBANDO
X + Y = 4
3 + 1 = 4