r-17=-21

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Solution for r-17=-21 equation: 


Simplifying
r + -17 = -21

Reorder the terms:
-17 + r = -21

Solving
-17 + r = -21

Solving for variable 'r'.

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

Add '17' to each side of the equation.
-17 + 17 + r = -21 + 17

Combine like terms: -17 + 17 = 0
0 + r = -21 + 17
r = -21 + 17

Combine like terms: -21 + 17 = -4
r = -4

Simplifying
r = -4

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