Respuestas

2012-12-06T05:46:10+01:00

-15x +12 +3. (2x-6) = 3x- (21x-1)+2
-15x +12 + 6x - 18 = 3x - 21x +1 +2
-9x - 6= -18x +3
-9x + 18x= 3+6
9x= 9
x= 9/9
x=1

2012-12-06T05:47:16+01:00

-15+12+3(2x-6) = 3x-(21x-1)+2
-15+12+6x-18 = 3x-21x+1+2
6x-21 = -18x+3
6x+18x = 3+21
24x = 24
x = 24/24 = 1