x+3x=2x+9

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Solution for x+3x=2x+9 equation: 


Simplifying
x + 3x = 2x + 9

Combine like terms: x + 3x = 4x
4x = 2x + 9

Reorder the terms:
4x = 9 + 2x

Solving
4x = 9 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
4x + -2x = 9 + 2x + -2x

Combine like terms: 4x + -2x = 2x
2x = 9 + 2x + -2x

Combine like terms: 2x + -2x = 0
2x = 9 + 0
2x = 9

Divide each side by '2'.
x = 4.5

Simplifying
x = 4.5

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