(2.5+6)+3=2.5+(x+3)

Solution for (2.5+6)+3=2.5+(x+3) equation:

Simplifying
(2.5 + 6) + 3 = 2.5 + (x + 3)

Combine like terms: 2.5 + 6 = 8.5
(8.5) + 3 = 2.5 + (x + 3)
8.5 + 3 = 2.5 + (x + 3)

Combine like terms: 8.5 + 3 = 11.5
11.5 = 2.5 + (x + 3)

Reorder the terms:
11.5 = 2.5 + (3 + x)

Remove parenthesis around (3 + x)
11.5 = 2.5 + 3 + x

Combine like terms: 2.5 + 3 = 5.5
11.5 = 5.5 + x

Solving
11.5 = 5.5 + 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.
11.5 + -1x = 5.5 + x + -1x

Combine like terms: x + -1x = 0
11.5 + -1x = 5.5 + 0
11.5 + -1x = 5.5

Add '-11.5' to each side of the equation.
11.5 + -11.5 + -1x = 5.5 + -11.5

Combine like terms: 11.5 + -11.5 = 0.0
0.0 + -1x = 5.5 + -11.5
-1x = 5.5 + -11.5

Combine like terms: 5.5 + -11.5 = -6
-1x = -6

Divide each side by '-1'.
x = 6

Simplifying
x = 6