6. 20 - (x + 5) = 3(x - 3)
7. 18 + (x - 4) = 5(x + 1)​

Respuestas

Respuesta dada por: axllxa
2

20 - (x + 5) = 3(x - 3)

20 - x - 5 = 3x - 9

15 - x = 3x - 9

15 + 9 = 3x + x

25 = 4x

25/4 = x

18 + (x - 4) = 5(x + 1)​

18 + x - 4 = 5x + 5​

14  + x = 5x + 5

14 - 5 = 5x - x

9 = 4x

9/4 = x

Eternamente axllxa

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