x=y-3x

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Solution for x=y-3x equation: 


Simplifying
x = y + -3x

Reorder the terms:
x = -3x + y

Solving
x = -3x + y

Solving for variable 'x'.

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

Add '3x' to each side of the equation.
x + 3x = -3x + 3x + y

Combine like terms: x + 3x = 4x
4x = -3x + 3x + y

Combine like terms: -3x + 3x = 0
4x = 0 + y
4x = y

Divide each side by '4'.
x = 0.25y

Simplifying
x = 0.25y

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