Question 45134
4/S+7/S~2=0 OR (4S+7)/S~2=0 OR 4S+7=0 OR S=-7/4 

PROOF 4/(-7/4)+7/(-7/4)~2=0 OR 4*-4/7+7*(-4/7)~2 OR -16/7+7(16/49)=0 OR

-16/7+16/7=0 OR 0=0