8+r=-21

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Solution for 8+r=-21 equation: 


Simplifying
8 + r = -21

Solving
8 + r = -21

Solving for variable 'r'.

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

Add '-8' to each side of the equation.
8 + -8 + r = -21 + -8

Combine like terms: 8 + -8 = 0
0 + r = -21 + -8
r = -21 + -8

Combine like terms: -21 + -8 = -29
r = -29

Simplifying
r = -29

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