Question

O valor de x é?

a)7,2
b)7,5
c)9,0
d)14,0
e)14,2

Answer 1

Explicação passo-a-passo:

x/x+2 = x-7/x-6

x(x-6) = (x+2)(x-7)

x² - 6x = x² - 7x + 2x - 14

-6x + 7x - 2x = -14

-x = -14

x = 14