x+x+3=42

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Solution for x+x+3=42 equation: 


Simplifying
x + x + 3 = 42

Reorder the terms:
3 + x + x = 42

Combine like terms: x + x = 2x
3 + 2x = 42

Solving
3 + 2x = 42

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -3 + 2x = 42 + -3

Combine like terms: 3 + -3 = 0
0 + 2x = 42 + -3
2x = 42 + -3

Combine like terms: 42 + -3 = 39
2x = 39

Divide each side by '2'.
x = 19.5

Simplifying
x = 19.5

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