Question

La solución de la ecuación x−1/5/x−1=4, es

Answer 1

(x - 1) ÷ 5 / (x - 1) = 4 ⇒ (x - 1) = 4(5) / (x - 1) ⇒ x - 1 = 20 / x - 1 
(x - 1)(x - 1) = 20
(x - 1)² = 20 ⇒ (x - 1) = √20 = 2√5 
⇒ x = 2√5 + 1