r+21=14

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Solution for r+21=14 equation: 


Simplifying
r + 21 = 14

Reorder the terms:
21 + r = 14

Solving
21 + r = 14

Solving for variable 'r'.

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

Add '-21' to each side of the equation.
21 + -21 + r = 14 + -21

Combine like terms: 21 + -21 = 0
0 + r = 14 + -21
r = 14 + -21

Combine like terms: 14 + -21 = -7
r = -7

Simplifying
r = -7

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