Respostas

2014-03-10T18:16:40-03:00
Quais numeros naturais as letras representam?
a)x+8=8+5
x=8 -8 +5
x=5

 b)29+a=3+29
a= 3 +29 -29
a=3

c)c+8=8+c
c - c = 8 - 8
=0

d)o+x+14????
e)54+a=54
a= 54-54
a=0

f)y+o=6
y=6-0
y=6

g)a+15=15+17
 a= 15-15 +17
a=17

h)(6+8)+10=6+(x+10)
6+8 +10 = 6 +x +16
6 +8 +10 -6 -16=x
x=2

e)(y+3)+17=5+(3+12)
y +3 + 17 = 5 +3 +12
y =5 + 3 +12 -17 -3
y = 18 - 20
y=-2
1 5 1