320+80=x

Solution for 320+80=x equation:

Simplifying
320 + 80 = x

Combine like terms: 320 + 80 = 400
400 = x

Solving
400 = x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-1x' to each side of the equation.
400 + -1x = x + -1x

Combine like terms: x + -1x = 0
400 + -1x = 0

Add '-400' to each side of the equation.
400 + -400 + -1x = 0 + -400

Combine like terms: 400 + -400 = 0
0 + -1x = 0 + -400
-1x = 0 + -400

Combine like terms: 0 + -400 = -400
-1x = -400

Divide each side by '-1'.
x = 400

Simplifying
x = 400