4=y-x

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Solution for 4=y-x equation: 


Simplifying
4 = y + -1x

Reorder the terms:
4 = -1x + y

Solving
4 = -1x + y

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
4 + x = -1x + x + y

Combine like terms: -1x + x = 0
4 + x = 0 + y
4 + x = y

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

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

Simplifying
x = -4 + y

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