melissamoraes402 15/05/2013 (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
melissamoraes402
(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