Respuestas

2013-05-28T17:25:31+02:00
2(x+5)=2/5(x-3)
2x+10=2/5(x-3)
5(2x+10)=2(x-3)
10x+50=2x-6
8x=-56
x=7

3/5(x-1)-2/5(2x.4)=1/2-x
3/5x-3/5-16x/5=1/2-x
3/5x-16/5x+x=1/2+3/5
3x-16x+5x/5=5+6/10
3x-16x+5x/5   =20
-8x=20
x=20/8
x=5/2

2(x-3)-3(4x-5)=17-8x
2x-6-12x+15=17-8x
2x-12x+8x=17+6-15
-2x=8
x=-4