(2x)+(x+31.5)=123

Solution for (2x)+(x+31.5)=123 equation:

Simplifying
(2x) + (x + 31.5) = 123

Reorder the terms:
(2x) + (31.5 + x) = 123

Remove parenthesis around (31.5 + x)
(2x) + 31.5 + x = 123

Reorder the terms:
31.5 + (2x) + x = 123

Combine like terms: (2x) + x = 3x
31.5 + 3x = 123

Solving
31.5 + 3x = 123

Solving for variable 'x'.

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

Add '-31.5' to each side of the equation.
31.5 + -31.5 + 3x = 123 + -31.5

Combine like terms: 31.5 + -31.5 = 0.0
0.0 + 3x = 123 + -31.5
3x = 123 + -31.5

Combine like terms: 123 + -31.5 = 91.5
3x = 91.5

Divide each side by '3'.
x = 30.5

Simplifying
x = 30.5