y-x=9

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Solution for y-x=9 equation: 


Simplifying
y + -1x = 9

Reorder the terms:
-1x + y = 9

Solving
-1x + y = 9

Solving for variable 'x'.

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

Add '-1y' to each side of the equation.
-1x + y + -1y = 9 + -1y

Combine like terms: y + -1y = 0
-1x + 0 = 9 + -1y
-1x = 9 + -1y

Divide each side by '-1'.
x = -9 + y

Simplifying
x = -9 + y

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