r+28=18

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Solution for r+28=18 equation: 


Simplifying
r + 28 = 18

Reorder the terms:
28 + r = 18

Solving
28 + r = 18

Solving for variable 'r'.

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

Add '-28' to each side of the equation.
28 + -28 + r = 18 + -28

Combine like terms: 28 + -28 = 0
0 + r = 18 + -28
r = 18 + -28

Combine like terms: 18 + -28 = -10
r = -10

Simplifying
r = -10

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