Answers

  • Brainly User
2016-07-08T02:38:22+08:00
 \frac{4}{x+5} = \frac{x}{x+3}

Apply the solution in proportion:
4(x+3) = x (x+5)
4x + 12 = x² + 5x

Quadratic Equation:
x² + 5x - 4x - 12 = 0
x² + x - 12 = 0

Factor:
(x + 4) (x - 3) = 0

Roots:
x + 4 = 0         x - 3 = 0
x = -4              x = 3

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