Respostas

A melhor resposta!
2014-08-24T18:22:32-03:00
X-2y=-16
x=-16+2y

8x+3y=60
8(-16+2y)+3y=60
-128+16y+3y=60
-128+19y=60
19y=60+128
19y=188
y=188/19

x=-16+2y
x=-16+(188/19)
x=(188/19)-(304/19)
x=(188-304)/19
x=116/19
1 5 1
2014-08-24T18:38:37-03:00
X-2y=-16 (-8)
8x+3y=60
19y=188
y=188/19
y=9,8
8x=30,6
x=3,825

x+2y=11 
 x-y=1 (2)
3x=13
x=13/3
x=4,3
2y=11-4,3
y=6,7
y=3,35