r+8=13

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Solution for r+8=13 equation: 


Simplifying
r + 8 = 13

Reorder the terms:
8 + r = 13

Solving
8 + r = 13

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 + r = 13 + -8

Combine like terms: 8 + -8 = 0
0 + r = 13 + -8
r = 13 + -8

Combine like terms: 13 + -8 = 5
r = 5

Simplifying
r = 5

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