2r-27=21

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Solution for 2r-27=21 equation: 


Simplifying
2r + -27 = 21

Reorder the terms:
-27 + 2r = 21

Solving
-27 + 2r = 21

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 + 2r = 21 + 27

Combine like terms: -27 + 27 = 0
0 + 2r = 21 + 27
2r = 21 + 27

Combine like terms: 21 + 27 = 48
2r = 48

Divide each side by '2'.
r = 24

Simplifying
r = 24

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