Odpowiedzi

2009-05-27T19:12:50+02:00
A) -2x = -5 - 97
-2x = -102: (-2)
x = 51
b) -9x = 7 - 43
-9x = -36 :(-9)
x = 4
c) 12x = 11-17
12x = -6:12
x = -1/2
1 5 1
2009-05-27T19:18:03+02:00
A)
97 = 2x-5 / +5
97+5 = 2x
102 = 2x /:2
51 = x

b)
43 = 7+9x /-7
43-7 = 9x
36 = 9x /:9
4 = x

c)
17 = 11-12x /-11
17-11 = -12x
6 = -12x /:(-12x)
- 0,5 = x
2009-05-27T19:19:53+02:00
A) 2x=5+97; 2x=102; x=51
b) -9x=7-43; 9x=36; x=4
c) 12x=11-17; 12x=-6; x=-1/2
1 5 1