(2b-90)+0.6+b+(b+45)+90=540

Solution for (2b-90)+0.6+b+(b+45)+90=540 equation:

Simplifying
(2b + -90) + 0.6 + b + (b + 45) + 90 = 540

Reorder the terms:
(-90 + 2b) + 0.6 + b + (b + 45) + 90 = 540

Remove parenthesis around (-90 + 2b)
-90 + 2b + 0.6 + b + (b + 45) + 90 = 540

Reorder the terms:
-90 + 2b + 0.6 + b + (45 + b) + 90 = 540

Remove parenthesis around (45 + b)
-90 + 2b + 0.6 + b + 45 + b + 90 = 540

Reorder the terms:
-90 + 0.6 + 45 + 90 + 2b + b + b = 540

Combine like terms: -90 + 0.6 = -89.4
-89.4 + 45 + 90 + 2b + b + b = 540

Combine like terms: -89.4 + 45 = -44.4
-44.4 + 90 + 2b + b + b = 540

Combine like terms: -44.4 + 90 = 45.6
45.6 + 2b + b + b = 540

Combine like terms: 2b + b = 3b
45.6 + 3b + b = 540

Combine like terms: 3b + b = 4b
45.6 + 4b = 540

Solving
45.6 + 4b = 540

Solving for variable 'b'.

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

Add '-45.6' to each side of the equation.
45.6 + -45.6 + 4b = 540 + -45.6

Combine like terms: 45.6 + -45.6 = 0.0
0.0 + 4b = 540 + -45.6
4b = 540 + -45.6

Combine like terms: 540 + -45.6 = 494.4
4b = 494.4

Divide each side by '4'.
b = 123.6

Simplifying
b = 123.6