Respostas

2014-09-01T19:47:52-03:00
A) 1=1x+15
1-15=1x
-14=x

b) x+2= 13x
x-13x = -2
-12x= -2
x= -12/-2
x= 6

c) 2x-1=1x+4
2x-1x=4+1
1x=5
x= 5/1
x=5

1 1 1