r+12=-13

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Solution for r+12=-13 equation: 


Simplifying
r + 12 = -13

Reorder the terms:
12 + r = -13

Solving
12 + r = -13

Solving for variable 'r'.

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

Add '-12' to each side of the equation.
12 + -12 + r = -13 + -12

Combine like terms: 12 + -12 = 0
0 + r = -13 + -12
r = -13 + -12

Combine like terms: -13 + -12 = -25
r = -25

Simplifying
r = -25

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