-5.5-8=x

Solution for -5.5-8=x equation:

Simplifying
-5.5 + -8 = x

Combine like terms: -5.5 + -8 = -13.5
-13.5 = x

Solving
-13.5 = 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.
-13.5 + -1x = x + -1x

Combine like terms: x + -1x = 0
-13.5 + -1x = 0

Add '13.5' to each side of the equation.
-13.5 + 13.5 + -1x = 0 + 13.5

Combine like terms: -13.5 + 13.5 = 0.0
0.0 + -1x = 0 + 13.5
-1x = 0 + 13.5

Combine like terms: 0 + 13.5 = 13.5
-1x = 13.5

Divide each side by '-1'.
x = -13.5

Simplifying
x = -13.5