-13+r=r-20

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Solution for -13+r=r-20 equation: 


Simplifying
-13 + r = r + -20

Reorder the terms:
-13 + r = -20 + r

Add '-1r' to each side of the equation.
-13 + r + -1r = -20 + r + -1r

Combine like terms: r + -1r = 0
-13 + 0 = -20 + r + -1r
-13 = -20 + r + -1r

Combine like terms: r + -1r = 0
-13 = -20 + 0
-13 = -20

Solving
-13 = -20

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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