X+.9x=4.20

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Solution for X+.9x=4.20 equation: 


Simplifying
X + 0.9x = 4.20

Solving
X + 0.9x = 4.20

Solving for variable 'X'.

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

Add '-0.9x' to each side of the equation.
X + 0.9x + -0.9x = 4.20 + -0.9x

Combine like terms: 0.9x + -0.9x = 0.0
X + 0.0 = 4.20 + -0.9x
X = 4.20 + -0.9x

Simplifying
X = 4.20 + -0.9x

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