04-09-2016
Mathematics

contestada

(X + 1)/7 =5/(x - 1)

Respuesta :

tinmann tinmann

04-09-2016

ok so

(x+1)/7 = 5/(x-1)

5(x+1)/7 = 35/7(x-1)

5x+5/35 = 35/7x-7

5/35 = 35/2x - 7

7 = 35/2x-7

14x - 49 = 35

14x = 84

x = 6

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