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30 - 8 + X = 2Y + 30
22 + X = 2Y + 30
X = 2Y + 30 - 22
X = 2Y + 8 (Ecuacion 1)
5X - 29 = X - (5 - 4Y)
5X - 29 = X - 5 + 4Y
5X - X - 29 = 4Y - 5
4X = 4Y - 5 + 29
4X = 4Y + 24 (Divido toda la expresion entre 4)
X = Y + 6 (Ecuacion 2)
X = X:
X = 2Y + 8
X = Y + 6
2Y + 8 = Y + 6
2Y - Y = 6 - 8
Y = -2
Ahora reemplazo el valor de Y = -2 en: X = 2Y + 8
X = 2(-2) + 8
X = -4 + 8
X = 4
Rta: X = 4 , Y = -2