Respostas

2014-08-23T21:52:08-03:00

A) x+6=11 -> x=11-6 :. x= 5
B) y+7=6 -> y= 6 -7 :. y= -1
C) -2r=6 -> r= 6/-2 :. r= -3
D) x-5=7 -> x= 7+5 :. x= 12
F) n/3=5 -> n= 5x 3 :. n= 15
G) 2t+3=15 -> 2t= 15 -3 :. 2t =12 :. t =12/2 :. t=6
H) 3y-1=29 -> 3y= 29+1:. 3y =30 :. y= 30/3 :. y=1

I) 2x=11 -> x= 11/2 :. x=5,5
J) (x+1)+4=9 -> x+4 +5 =9 :. x+4=9-5 :. x+4=4 :. x=4-4 :. x=4

K) 7x=0 -> x=0/7 :. x=0