Odpowiedzi

2010-03-30T15:22:39+02:00
A)1/2 - x = -6 + 4
-(1/2x) = -2 / :(-1/2)
x = 1
b) x - 1/3x = 1 + 5
1/3x = 6 / 1/3
x = 2
c)x/4 - 1/4 = 2 /*4
x - 1 = 8
x = 8 + 1
x = 9
d)x/5 - 3 = x + 1/3 /*5
x - 15 = 5x = 1 i 2/3
-4x = 16 i 2/3 / :-4
x = 4 i 1/6
e)3/6x - 3/6 = 4
3/6x = 4 i 3/6 /:3/6
x = 9
f) 1/2x + 3 = -x
-1 i 1/2x = 3 / -1 i 1/2
x = -2

Licze na naj :]

  • Użytkownik Zadane
2010-03-30T15:22:46+02:00
A) x-8=2x-12
-x=-4/(-1)
x=4
b)2x-10=x+2
x=12
c)x-1=8
x=9
d)x-15=5x+1
-4x=16/(-4)
x=-4
e)5x-5=24
5x=29/5
x=5,8
2010-03-30T15:24:59+02:00

a) ½x-4=x-6 /*2
x - 8 = 2x - 12
x - 2x = -12 +8
-x = -4 / *(-1)
x = 4

b) x-5=⅓x+1 /*3
3x - 15 = x + 3
3x - x = 3 +15
2x = 18 / :2
x = 9

c) x/4-¼=2 /*4
x - 1 = 2
x = 3

d) x/5-3=x+⅕ /*5
x - 15 = 5x +1
x - 5x = 1 + 15
-4x = 16 / :(-4)
x = -4

e) ⅚(x-1)=4
⅚x - ⅚ = 4 / * 6
5x - 5 = 24
5x = 24 - 5
5x = 19 / :5
x = 3 ⅘

f) -½(-x-6)=-x
½x + 3 = -x / *2
x + 6 = -2x
3x = 6 / :3
x = 2