Respuestas

2014-03-09T19:17:24+01:00
2x + 3y = -1
x= (-1 - 3y)/2 =
sustituyendo
3 (-1 -3y)/2 + 4y = 0
(-3 - 9y) / 2 + 4y = 0
-3/2 - 9/2 y + 4 y = 0
-1/2 y = 3/2
-y= 3/2 * 2
y = -3
sustituyendo
2x + 3(-3) = -1
2x = -1 +9 = 8
x=8/2=4
x=4
comprobación
2(4) + 3(-3) = -1
8-9= -1
3(4) + 4 (-3) =0
12 -12 =0
0=0