r+r+8=16

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Solution for r+r+8=16 equation: 


Simplifying
r + r + 8 = 16

Reorder the terms:
8 + r + r = 16

Combine like terms: r + r = 2r
8 + 2r = 16

Solving
8 + 2r = 16

Solving for variable 'r'.

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

Add '-8' to each side of the equation.
8 + -8 + 2r = 16 + -8

Combine like terms: 8 + -8 = 0
0 + 2r = 16 + -8
2r = 16 + -8

Combine like terms: 16 + -8 = 8
2r = 8

Divide each side by '2'.
r = 4

Simplifying
r = 4

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