Respuestas

2013-08-09T06:07:46+02:00
17x-2x=15-8.......15x=7.....x=7/15
5x-2x=9........3x=9.......x=3
3x+1+8x-4=5x+25-2x+6..............11x-3=3x+31......8x=31+3......8x=34.....x=17/4