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el doble de un número= 2x
aumentado en cinco= 2x +5
equivale a veinticinco= 2x +5 = 25
Resolución
2x+5= 25
2x = 25-5
x = 20/ 2
x = 10
Respuesta X= 10
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comprobamos:
2x +5 = 25
Reemplazamos 10 en x.
2(10) +5 = 25
20+5 = 25
25 = 25
➡Demostrado X = 10
Un abrazo mi querido Watson... C;