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2009-05-10T19:59:38+02:00
3x=24-3y/:3
x-5y=2

x=8-y
8-y-5y=2

8-6y=2
8-2=6y/6
1=y

x=2+5
x=7
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2009-05-10T20:01:02+02:00
3x=24-3y/:3
x-5y=2

x=8-y
8-y-5y=2

8-6y=2
8-2=6y/6
1=y

x=2+5
x=7
2009-05-10T20:02:07+02:00
3x+3y=24
x-5y=2 /× -3

3x+3y=24
-3x+15y=-6
________________
+ 18y=18
y=1

3x+3=24
3x=21
x=7

x=7
y=1

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2009-05-10T20:04:35+02:00
3x + 3y = 24
x=2+5y

3(2+5y)+3y=24
6+15y+3y=24
18y= -18 /÷18
y= -1
x= 2+ 5 × -1
x= -3
y= -1