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2x = 7 - 3
2x = 4
x = 4 : 2 = 2
Doble de un número: 2x
Aumentado: +
Ecuación: 2x + 3 = 7
2x + 3 = 7
2x = 7 - 3
2x = 4
x = 4/2
x = 2 <== Número.
Comprobar:
2x + 3 = 7
2 (2) + 3 = 7
4 + 3 = 7
7 = 7 <== Correcto.
Att: Diana ❤