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2010-04-13T20:24:52+02:00
2(5x-1)=8
10x - 2 = 8
10x= 10 | :10
x= 1

0,5(4y+6)=3
2y +3=3
2y=0 | :2
y=0

-3(x-2)=-9
-3x+6=-9
-3x=-3 | :(-3)
x=1
2010-04-13T20:25:01+02:00
2(5x-1)=8
10x-2=8
10x=10/10
x=1

0,5(4y+6)=3
2y+3=3
2y=3-3
2y=0
y=-2

-3(x-2)=-9
-3x+6=-9
-3x=-9-6
-3x=-15/-3
x=5

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2010-04-13T20:30:52+02:00
A)
2(5x-1)=8
10x-2=8
10x=8+2
10x=10 /:10
x=1


b)
0,5(4y+6)=3
2y+3=3
2y=3-3
2y=0 /:2
y=0

c)
-3(x-2)=-9
-3x+6=-9
-3x=-9 - 6
-3x=-15 /:(-3)
x=5