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2010-04-07T18:21:28+02:00
(x-7)-2(3x+5)=3
x-7-6x-10=3
-5x=10 /(-5)
x=-2

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2010-04-07T18:21:53+02:00
( x -7)-2(3x+5)=3
(x-7)- 6x -10= 3
x-7-6x-10 = 3
-5x-17 = 3 / +17
-5x= 20 / : (-5)
x = -4
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