4.2x-4.2y=2.1

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Solution for 4.2x-4.2y=2.1 equation: 


Simplifying
4.2x + -4.2y = 2.1

Solving
4.2x + -4.2y = 2.1

Solving for variable 'x'.

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

Add '4.2y' to each side of the equation.
4.2x + -4.2y + 4.2y = 2.1 + 4.2y

Combine like terms: -4.2y + 4.2y = 0.0
4.2x + 0.0 = 2.1 + 4.2y
4.2x = 2.1 + 4.2y

Divide each side by '4.2'.
x = 0.5 + y

Simplifying
x = 0.5 + y

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