Solve for y.
-80 + y = 80
help?

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

The appalachian trail is a hiking trail that passes through the appalachian mountains. three members of a teen hiking group hiked a section of the trail. the hikers stopped at a rest area and equally shared 3 4 gallon of water. how much water did each person get?

If the measure of angle 1 is 110 degrees and the measure of angle 3 is (2 x+10 degree), what is the value of x?