Răspunsuri

2014-06-03T14:27:11+03:00
X - numar
x+x/4+85=500
4x+x+340=2000
5x=2000-340
5x=1660
x=332
2014-06-03T14:28:56+03:00
X+x/4+85=100
amplificam cu 4 si rezulta:
4x+x+340=2000
5x+340=2000
5x=2000-340
5x=1660
x=1660:5
x=332