Respostas

2013-06-12T01:59:51-03:00

a) x=7.3
x=21

b) x=-3.4
x=-12

c)2x=4.5
x=20/2
x=10

d) 2x=-10.3
x=-30/2
x=-15

e)3x=30.4
x=120/3
x=40

f)2x=-18.5
2x= -90
x=-90/2
x=-45