Respostas

2014-08-17T22:31:12-03:00
1) x= -9+17
x=8

2) x= -7/2
x= -3,5

3) 3x-2x=-11
x=21

4) x=16/2
x=8
2014-08-17T22:44:02-03:00
X - 17 = - 9

x = - 9 + 17

x = 8


2x = - 7

x = - 7/2 ou 3,5


3x = 2x - 11

3x - 2x = - 11

x = - 11

2x = 16

x = 16/2

x = 8