r-21=-24

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Solution for r-21=-24 equation: 


Simplifying
r + -21 = -24

Reorder the terms:
-21 + r = -24

Solving
-21 + r = -24

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 = -24 + 21

Combine like terms: -21 + 21 = 0
0 + r = -24 + 21
r = -24 + 21

Combine like terms: -24 + 21 = -3
r = -3

Simplifying
r = -3

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