2x+4=a

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Solution for 2x+4=a equation: 


Simplifying
2x + 4 = a

Reorder the terms:
4 + 2x = a

Solving
4 + 2x = a

Solving for variable 'x'.

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

Add '-4' to each side of the equation.
4 + -4 + 2x = -4 + a

Combine like terms: 4 + -4 = 0
0 + 2x = -4 + a
2x = -4 + a

Divide each side by '2'.
x = -2 + 0.5a

Simplifying
x = -2 + 0.5a

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