Verified Answer :

\(- x - 3 + \frac{3}{4} x = -5\)

=>   \(- ( x + 3 ) + \frac{3}{4} x = -5\)

=>   \(- x + \frac{3}{4} x = -5 + 3\)

=>   \(- \frac{1}{4} x = - 2\)

=>   \(x = (- 2) (- 4)\)

=>       x = 8