(2x)+(x+12)=31

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Solution for (2x)+(x+12)=31 equation: 


Simplifying
(2x) + (x + 12) = 31

Reorder the terms:
(2x) + (12 + x) = 31

Remove parenthesis around (12 + x)
(2x) + 12 + x = 31

Reorder the terms:
12 + (2x) + x = 31

Combine like terms: (2x) + x = 3x
12 + 3x = 31

Solving
12 + 3x = 31

Solving for variable 'x'.

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

Add '-12' to each side of the equation.
12 + -12 + 3x = 31 + -12

Combine like terms: 12 + -12 = 0
0 + 3x = 31 + -12
3x = 31 + -12

Combine like terms: 31 + -12 = 19
3x = 19

Divide each side by '3'.
x = 6.333333333

Simplifying
x = 6.333333333

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