X-9=7y

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Solution for X-9=7y equation: 


Simplifying
X + -9 = 7y

Reorder the terms:
-9 + X = 7y

Solving
-9 + X = 7y

Solving for variable 'X'.

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

Add '9' to each side of the equation.
-9 + 9 + X = 9 + 7y

Combine like terms: -9 + 9 = 0
0 + X = 9 + 7y
X = 9 + 7y

Simplifying
X = 9 + 7y

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