9r-5r+7=7r-r

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Solution for 9r-5r+7=7r-r equation:


Simplifying
9r + -5r + 7 = 7r + -1r

Reorder the terms:
7 + 9r + -5r = 7r + -1r

Combine like terms: 9r + -5r = 4r
7 + 4r = 7r + -1r

Combine like terms: 7r + -1r = 6r
7 + 4r = 6r

Solving
7 + 4r = 6r

Solving for variable 'r'.

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

Add '-6r' to each side of the equation.
7 + 4r + -6r = 6r + -6r

Combine like terms: 4r + -6r = -2r
7 + -2r = 6r + -6r

Combine like terms: 6r + -6r = 0
7 + -2r = 0

Add '-7' to each side of the equation.
7 + -7 + -2r = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -2r = 0 + -7
-2r = 0 + -7

Combine like terms: 0 + -7 = -7
-2r = -7

Divide each side by '-2'.
r = 3.5

Simplifying
r = 3.5

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