Respostas

2013-10-07T23:09:26-03:00
5y-1/10-1/2=1-2-y/5
5y-1/9/2=-1-y/5
5y-1/9/2/1=-1-y/5
5y-1/9 x 1/2=-1-y/5
5y-1/18=-1-y/5
multiplica cruzado
5y-1 x 5 =18 x (-1-y)
25y-5=-18-18y
25y+18y=-18+5
43y=-13 (-1)
y=13/43

  • Usuário do Brainly
2013-10-08T02:44:06-03:00
5y - 1/10 - 1/2 = 1 - 2 - y/5
mmc 10, 2, 5
10,2,5/2
5,1,5/5
1,1,1

(2*5) = 10

50y - 1 - 5 = 10 - 20 - 2y
50y + 2y = 10 - 20 + 1 + 5
52y = - 10 + 1 + 5
52y = - 9 + 5
52y = - 4
y = - 4 / 52 (simplifica por 4)
y = - 1 / 13