-12+r=3

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Solution for -12+r=3 equation: 


Simplifying
-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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