r+12=-3

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Solution for r+12=-3 equation: 


Simplifying
r + 12 = -3

Reorder the terms:
12 + r = -3

Solving
12 + r = -3

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 = -3 + -12

Combine like terms: 12 + -12 = 0
0 + r = -3 + -12
r = -3 + -12

Combine like terms: -3 + -12 = -15
r = -15

Simplifying
r = -15

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