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Simplifying
5r2 = 35
Solving
5r2 = 35
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Divide each side by '5'.
r2 = 7
Simplifying
r2 = 7
Take the square root of each side:
r = {-2.645751311, 2.645751311}
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