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2010-04-04T14:26:13+02:00
A] -5x-5=5
-5x=5+5
-5x=10 /:5
-x=2
x=-2

b] 1/2x+4=-6 /*2
x+8=-12
x=-12+8
x=-4

d] 3x-4=5x+2
3x-5x=2+4
-2x=6 /:2
-x=3
x=3

e]-2x=7x-2
-2x-7x=-2
-9x=-2 /:9
-x=-2/9
x=2/9

f] 2/3 (6x-9)=2
4x-6=2
4x=2+6
4x=8 /:4
x=2

g]- nie wiem ;)
4 5 4
2010-04-04T14:27:03+02:00
-5x-5=5
-5x=10/:(-5)
x=-2

1/2x=4=-6
1/2x=-10/*2
x=-20

0,6-3/4x=-1/3
-3/4x=-1/3-6/10
-3/4x=10/30-18/30
-3/4x=-8/30/:(-3/4)
x=32/90
x=16/45

3x-4=5x+2
3x-5x=2+4
-2x=6/:(-2)
x=-3

-2x=7x-2
-2x-7x=-2
-9x=-2/:(-9)
x=2/9

2/3(6x-9)=2
4x-6=2
4x=2+6
4x=8/:4
x=2

1/10(25x-40)+2=3/4(8x+12)-9
2,5x-4+2=6x+9-9
2,5x-6x=4-2+9-9
-3,5x=2/:(-3,5)
x=-4/7
2010-04-04T14:29:27+02:00
A)
-5x-5=5
-5x=5+5
-5x=10 |:-5
x=-2

b)
1/2x+4=-6
1/2x=-6-4
1/2x=-10 |:1/2
x=-20

c)
0,6-3/4x=-1/3
[0,6=2/3]
2/3-3/4x=-1/3
-3/4x=-1/3-2/3
-3/4x=-1 |:-3/4
x=4/3

d)
3x-4=5x+2
3x-5x=2+4
-2x=6 |:-2
x=-3

e)
-2x=7x-2
-2x-7x=-2
-9x=-2 |:-9
x=2/9


f)
2/3 (6x-9)=2
4x-6=2
4x=2+6
4x=8 |:4
x=2


g)
1/10 (25x-40 ) +2=3/4 (8x+12) -9
2,5x-4+2=6x+9-9
2,5x-6x=9-9+4-2
-3,5x=2 |:-3,5
x=-4/7
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