4x-1y=9

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Solution for 4x-1y=9 equation: 


Simplifying
4x + -1y = 9

Solving
4x + -1y = 9

Solving for variable 'x'.

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

Add 'y' to each side of the equation.
4x + -1y + y = 9 + y

Combine like terms: -1y + y = 0
4x + 0 = 9 + y
4x = 9 + y

Divide each side by '4'.
x = 2.25 + 0.25y

Simplifying
x = 2.25 + 0.25y

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