r+(-11)=-21

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Solution for r+(-11)=-21 equation: 


Simplifying
r + (-11) = -21
r + -11 = -21

Reorder the terms:
-11 + r = -21

Solving
-11 + r = -21

Solving for variable 'r'.

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

Add '11' to each side of the equation.
-11 + 11 + r = -21 + 11

Combine like terms: -11 + 11 = 0
0 + r = -21 + 11
r = -21 + 11

Combine like terms: -21 + 11 = -10
r = -10

Simplifying
r = -10

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