4y-5x=45

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Solution for 4y-5x=45 equation: 


Simplifying
4y + -5x = 45

Reorder the terms:
-5x + 4y = 45

Solving
-5x + 4y = 45

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.
-5x + 4y + -4y = 45 + -4y

Combine like terms: 4y + -4y = 0
-5x + 0 = 45 + -4y
-5x = 45 + -4y

Divide each side by '-5'.
x = -9 + 0.8y

Simplifying
x = -9 + 0.8y

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