21y-4x=180

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Solution for 21y-4x=180 equation: 


Simplifying
21y + -4x = 180

Reorder the terms:
-4x + 21y = 180

Solving
-4x + 21y = 180

Solving for variable 'x'.

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

Add '-21y' to each side of the equation.
-4x + 21y + -21y = 180 + -21y

Combine like terms: 21y + -21y = 0
-4x + 0 = 180 + -21y
-4x = 180 + -21y

Divide each side by '-4'.
x = -45 + 5.25y

Simplifying
x = -45 + 5.25y

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