Respuesta:
PAMELA: X-10= 20-10= 10
TERESA: X= 20
X-10+X= 30
2X= 30+10
2X= 40
X= 40/2
X= 20
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Respuesta:
PAMELA: X-10= 20-10= 10
TERESA: X= 20
X-10+X= 30
2X= 30+10
2X= 40
X= 40/2
X= 20