Réponses

2014-02-12T18:07:29+01:00
6x-4=8x+7
<=> 8x-6x=-4-7
<=> 2x=-11
<=> x=-11/2

0,5x+ \sqrt{2} =2,5x-3 \sqrt{2}
2,5x-0,5x= \sqrt{2} +3 \sqrt{2}
2x=4 \sqrt{2}
x=2 \sqrt{2}
2014-02-12T18:15:09+01:00