Please help me by completing the system of equations here there is equation 1:
-10y+9x=-9
and equation 2:
10y+5x=-5
Thank you for your time
needed ASAP

Scarlett stopped at a campground along the appalachian trail. the campground had a 12 acre area for tents, divided into 6 equal campsites. scarlett picked one of the sections to pitch her tent. which expression would give you the size of scarlett’s campsite? (more than one answer