-9+4r=4r+-9

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Solution for -9+4r=4r+-9 equation: 


Simplifying
-9 + 4r = 4r + -9

Reorder the terms:
-9 + 4r = -9 + 4r

Add '9' to each side of the equation.
-9 + 9 + 4r = -9 + 9 + 4r

Combine like terms: -9 + 9 = 0
0 + 4r = -9 + 9 + 4r
4r = -9 + 9 + 4r

Combine like terms: -9 + 9 = 0
4r = 0 + 4r
4r = 4r

Add '-4r' to each side of the equation.
4r + -4r = 4r + -4r

Combine like terms: 4r + -4r = 0
0 = 4r + -4r

Combine like terms: 4r + -4r = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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