r-12=-28

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Solution for r-12=-28 equation: 


Simplifying
r + -12 = -28

Reorder the terms:
-12 + r = -28

Solving
-12 + r = -28

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 = -28 + 12

Combine like terms: -12 + 12 = 0
0 + r = -28 + 12
r = -28 + 12

Combine like terms: -28 + 12 = -16
r = -16

Simplifying
r = -16

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