La suma de 3 más el doble de un número es igual a ese número pero con signo negativo.llamemos x al número desconocido.

asked Mar 19, 2019 127k views

5 votes

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3 votes

Answer:

x = -1

Explanation:

3 + 2x = -x

- 2x - 2x

3 = -3x

divides 3 por ambos lados del signo igual

x = -1

Patrizio answered Mar 26, 2019

8.3k points

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