Question

1) Dada a função f(x) = ( 4x + 5) /(x+2) , determine x tal que f(x) = 7/9.

Answer 1

Resposta:

(4x + 5) / (x + 2) = 7/9

9 . (4x + 5) = 7 . (x + 2)

36x + 45 = 7x + 14

29x = -31

x = - 31/29