r+12=25

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Solution for r+12=25 equation: 


Simplifying
r + 12 = 25

Reorder the terms:
12 + r = 25

Solving
12 + r = 25

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 = 25 + -12

Combine like terms: 12 + -12 = 0
0 + r = 25 + -12
r = 25 + -12

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

Simplifying
r = 13

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