r+27=18

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Solution for r+27=18 equation: 


Simplifying
r + 27 = 18

Reorder the terms:
27 + r = 18

Solving
27 + r = 18

Solving for variable 'r'.

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

Add '-27' to each side of the equation.
27 + -27 + r = 18 + -27

Combine like terms: 27 + -27 = 0
0 + r = 18 + -27
r = 18 + -27

Combine like terms: 18 + -27 = -9
r = -9

Simplifying
r = -9

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