R-21=-64

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Solution for R-21=-64 equation: 


Simplifying
R + -21 = -64

Reorder the terms:
-21 + R = -64

Solving
-21 + R = -64

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 = -64 + 21

Combine like terms: -21 + 21 = 0
0 + R = -64 + 21
R = -64 + 21

Combine like terms: -64 + 21 = -43
R = -43

Simplifying
R = -43

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