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Entonces:
¿Cuál es el numero cuyo duplo aumentado en 3 es igual a 25?
===>>> 2x + 3 = 25
RESOLVIENDO:
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2x + 3 = 25
2x = 25 - 3
2x = 22
x = 22 ÷ 2
x = 11
COMPROBAMOS:
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2x + 3 = 25
2(11) + 3 = 25
22 + 3 = 25
25 = 25 ===>>> CORRECTO
RESPUESTA:
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El numero es 11