Răspunsuri

2014-09-06T12:26:43+03:00
|2x+1|=x<=>2x+1=x<=>2x-x=-1<=>x=-1
|x+4|=2x<=>x+4=2x<=>4=x
13x -15-9-6x=-3x<=>13x-6x+3x=15+9<=>10x=24<=>x=24/10<=>x=12/5
0,6+0,5x-1=x+0,5<=>0,5x-1=x-0,1<=>x/2-x=1-0,1<=>-x/2=0,9<=>-x=1,8<=>x=-1,8
0,4x+3=0,6x+0,2-x<=>-0,2x+x=-2,8<=>-x/5+x=-2,8<=>4x/5=-2,8<=>4x=-14<=>x=-14/4<=>x=-7/2