Question

F+V=E+2 solve for E
Please help me

Answer 1

`E=F+V-2`

Explanation:

Solving for a variable is the same as isolating it. In other words, we want to get E alone on one side of the equation. To do that, we can simply subtract 2 from either side, giving us the equation for E
`E=F+V-2`

Side note: This equation is one form of an extremely famous result about polyhedra, 3D solids made up of faces (F), vertices (V) and edges (E). Cubes, pyramids, and 12-sided dice (in math words, a dodecahedron) are all examples of these types of shapes, and the equation
`F+V-E=2` describes a relationship between the faces (polygons) vertices (points where three faces meet) and edges (lines where two edges meet). The 2 here specifically describes polyhedra that don't have some kind of hole in them. The Platonic solids (the ones in the attached photo) are all described by the relationship
`F+V-E=2`

Answer 2

Explanation:

`F+V=E+2 \\ F + V - 2 = E \\ E = F+V - 2`