(8+r)2=361

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Solution for (8+r)2=361 equation:


Simplifying
(8 + r) * 2 = 361

Reorder the terms for easier multiplication:
2(8 + r) = 361
(8 * 2 + r * 2) = 361
(16 + 2r) = 361

Solving
16 + 2r = 361

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-16' to each side of the equation.
16 + -16 + 2r = 361 + -16

Combine like terms: 16 + -16 = 0
0 + 2r = 361 + -16
2r = 361 + -16

Combine like terms: 361 + -16 = 345
2r = 345

Divide each side by '2'.
r = 172.5

Simplifying
r = 172.5

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