3.5x+X=9

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Solution for 3.5x+X=9 equation: 


Simplifying
3.5x + X = 9

Reorder the terms:
X + 3.5x = 9

Solving
X + 3.5x = 9

Solving for variable 'X'.

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

Add '-3.5x' to each side of the equation.
X + 3.5x + -3.5x = 9 + -3.5x

Combine like terms: 3.5x + -3.5x = 0.0
X + 0.0 = 9 + -3.5x
X = 9 + -3.5x

Simplifying
X = 9 + -3.5x

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