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Simplifying
11r2 = 7
Solving
11r2 = 7
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Divide each side by '11'.
r2 = 0.6363636364
Simplifying
r2 = 0.6363636364
Take the square root of each side:
r = {-0.797724035, 0.797724035}
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