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Simplifying
25r2 + -2 = 79
Reorder the terms:
-2 + 25r2 = 79
Solving
-2 + 25r2 = 79
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Add '2' to each side of the equation.
-2 + 2 + 25r2 = 79 + 2
Combine like terms: -2 + 2 = 0
0 + 25r2 = 79 + 2
25r2 = 79 + 2
Combine like terms: 79 + 2 = 81
25r2 = 81
Divide each side by '25'.
r2 = 3.24
Simplifying
r2 = 3.24
Take the square root of each side:
r = {-1.8, 1.8}
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