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Tenemos.
5x + (2x + 3) = 7x - (5 - x)
Resolver.
5x + (2x + 3) = 7x - (5 - x)
5x + 2x + 3 = 7x - 5 - x
Sumamos y restamos los términos semejantes.
7x + 3 = 7x - x- 5
7x + 3 = 6x - 5
7x - 6x = - 5 + 3
x = - 2
Respuesta.
El valor de de "x" es: - 2
7x+3=8x-5
8=x