r+13=1

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Solution for r+13=1 equation: 


Simplifying
r + 13 = 1

Reorder the terms:
13 + r = 1

Solving
13 + r = 1

Solving for variable 'r'.

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

Add '-13' to each side of the equation.
13 + -13 + r = 1 + -13

Combine like terms: 13 + -13 = 0
0 + r = 1 + -13
r = 1 + -13

Combine like terms: 1 + -13 = -12
r = -12

Simplifying
r = -12

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