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Simplifying
10r2 + -4r2 + -4r2 = 0
Combine like terms: 10r2 + -4r2 = 6r2
6r2 + -4r2 = 0
Combine like terms: 6r2 + -4r2 = 2r2
2r2 = 0
Solving
2r2 = 0
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Divide each side by '2'.
r2 = 0
Simplifying
r2 = 0
Take the square root of each side:
r = {0}
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