Respostas

2013-07-01T21:28:31-03:00
A) 17/6
b) x=42
c) x=33
d) ?
e) 16
f) 1
2013-07-01T21:34:00-03:00

a) 11/6+1/6+5/6= soma todos os numeradores e repete os denominadores pois eles são iguais. 11+1+5/6 = 17/6

 

b) 7/2=x/12=

2*x = 7*12 

2x = 84 

x=84/2

x= 42

 

c) 3/11=9/x=

3*x = 11*9

3x = 99

x= 99/3

x = 33

 

d) 6/18=1/18

6+1/18 = 7/18

 

e)4/7=x/28

7*x = 28*4

7x = 12

x = 112/7

x = 16

 

f)15/30=x/2

30*x = 15*2

30x = 30

x=30/30

x = 1

 

 

 

 

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