Question

Rezolvati in multimea numerelor reale ecuatiile : x-3 supra 3 = 5-x supra 2

Answer 1

$x - \frac{3}{3} = 5 - \frac{x}{2} \\ \\ x - 1 = 5 - \frac{x}{2} \\ \\ 2x - 2 = 10 - x \\ \\ 2x = 10 - x + 2 \\ \\ 2x = 12 - x \\ \\ 2x + x = 12 \\ \\ 3x = 12 \\ \\ x = \frac{12}{3} = 4$