Respostas

2013-05-14T21:45:55-03:00

(7-m)(7-n)(7-p)(7-q)=4

 

 

(7-m)(7-n)=2 

(7-p)(7-q)=2

 

(7-m)=2 (7-n)=1

(7-p)= -2 (7-q)= -1

 

7-m=2

-m= 2-7 

m=5

 

7-n=1

-n=-6

n=6

 

7-p= -2

-p=-7-2 

p=-9

p=9

 

7-q=-1

-q= -8

q=8

 

 

5+6+9+8=28