5+r=12

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Solution for 5+r=12 equation: 


Simplifying
5 + r = 12

Solving
5 + r = 12

Solving for variable 'r'.

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

Add '-5' to each side of the equation.
5 + -5 + r = 12 + -5

Combine like terms: 5 + -5 = 0
0 + r = 12 + -5
r = 12 + -5

Combine like terms: 12 + -5 = 7
r = 7

Simplifying
r = 7

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