The largest canyons and deepest valleys were created by moving water.
Think of a piece of paper that is enhanced to grow forever. This would
fit the definition of a plane. A plane is a flat surface that has no
thickness. A plane contains an infinite number of lines and extends
without end in the directions of its lines.
The answer to this problem is 11 because I did the inverse the inverse of subtraction is addition so I added 7+4 that gave me 11 than I subtracted 11-7 that gave me 4 so x=11