x-4y=9r

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Solution for x-4y=9r equation: 


Simplifying
x + -4y = 9r

Solving
x + -4y = 9r

Solving for variable 'x'.

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

Add '4y' to each side of the equation.
x + -4y + 4y = 9r + 4y

Combine like terms: -4y + 4y = 0
x + 0 = 9r + 4y
x = 9r + 4y

Simplifying
x = 9r + 4y

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