[tex] {}^{12)} x+ {}^{3)} \frac{x}{4} + {}^{4)} \frac{x}{3} = {}^{12)} 1995 \\ \\ \frac{12x}{12} + \frac{3x}{12} + \frac{4x}{12} = \frac{23940}{12} \: \: \: | \times 12 \\ \\ 12x + 3x + 4x = 23940 \\ 19x = 23940 \\ x = 23940 \div 19 \\ x = 1260 \: (numarul)[/tex]
[tex] \frac{x}{4} = \frac{1260}{4} = 315 \:(sfertul) \\ \\ \frac{x}{3} = \frac{1260}{3} = 420\:(treimea)[/tex]
