Odpowiedzi

2009-05-19T19:19:08+02:00
3-(x+1)+2=24
3-x-1+2=24
4-x=24
-x=24-4
-x=20 /*-1
x=-20
2009-05-19T19:20:27+02:00
3-(x+1)+2=24
3 - x - 1 + 2 = 24
4 - x = 24 / -4
-x = 20 / ×(-x)
x = -20
2009-05-19T19:21:55+02:00
3-(x+1)+2=24
3-(-x)+(-1)+2=24
3+x+(-1)+2=24
x=24+2+1-3
x=24