x^2-4r=12

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Solution for x^2-4r=12 equation: 


Simplifying
x2 + -4r = 12

Reorder the terms:
-4r + x2 = 12

Solving
-4r + x2 = 12

Solving for variable 'r'.

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

Add '-1x2' to each side of the equation.
-4r + x2 + -1x2 = 12 + -1x2

Combine like terms: x2 + -1x2 = 0
-4r + 0 = 12 + -1x2
-4r = 12 + -1x2

Divide each side by '-4'.
r = -3 + 0.25x2

Simplifying
r = -3 + 0.25x2

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