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Simplifying
12r2 = 27
Solving
12r2 = 27
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Divide each side by '12'.
r2 = 2.25
Simplifying
r2 = 2.25
Take the square root of each side:
r = {-1.5, 1.5}
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