Respuestas

2014-02-07T17:44:20+01:00
18x+4=34x-4
34x-4-18x-4=0
16x-8=0
x=1/2

11x+5x-x=65x-36
65x-36-11x-5x+x=0    50x-36=0   x036/50=18/25

3a-2+2a=a+10
3a-2+2a-a-10=0   4a-12=0   a=12/4=3

7x-13-9x=8x-3x-8
7x-13-9x-8x+3x+8=0  10x-17x-5=0  -7x-5=0   x=-5/7
2014-02-07T17:51:32+01:00
18x+4=34x-4
4 + 4 = 34x -18x
8  = 16x
8/16=x
1/2=x
0,5=x


11x+5x-x=65x-36
36 = 65x -11x -5x +1x
36=50x
36/50=x
18/25=x


3a-2+2a=a+10
3a +2a -a = 10 + 2
4x =12
x= 12/4
x=3


7x-13-9x=8x-3x-8
7x -9x -8x +3x= 13 -8
-7x = 5
x= -5/7