6.6=x-3.9

Solution for 6.6=x-3.9 equation:

Simplifying
6.6 = x + -3.9

Reorder the terms:
6.6 = -3.9 + x

Solving
6.6 = -3.9 + 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.
6.6 + -1x = -3.9 + x + -1x

Combine like terms: x + -1x = 0
6.6 + -1x = -3.9 + 0
6.6 + -1x = -3.9

Add '-6.6' to each side of the equation.
6.6 + -6.6 + -1x = -3.9 + -6.6

Combine like terms: 6.6 + -6.6 = 0.0
0.0 + -1x = -3.9 + -6.6
-1x = -3.9 + -6.6

Combine like terms: -3.9 + -6.6 = -10.5
-1x = -10.5

Divide each side by '-1'.
x = 10.5

Simplifying
x = 10.5