r+9=r-3

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Solution for r+9=r-3 equation: 


Simplifying
r + 9 = r + -3

Reorder the terms:
9 + r = r + -3

Reorder the terms:
9 + r = -3 + r

Add '-1r' to each side of the equation.
9 + r + -1r = -3 + r + -1r

Combine like terms: r + -1r = 0
9 + 0 = -3 + r + -1r
9 = -3 + r + -1r

Combine like terms: r + -1r = 0
9 = -3 + 0
9 = -3

Solving
9 = -3

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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