7r-5r+2r=5r-r

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Solution for 7r-5r+2r=5r-r equation: 


Simplifying
7r + -5r + 2r = 5r + -1r

Combine like terms: 7r + -5r = 2r
2r + 2r = 5r + -1r

Combine like terms: 2r + 2r = 4r
4r = 5r + -1r

Combine like terms: 5r + -1r = 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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