7r-5r+12=7r-r

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Solution for 7r-5r+12=7r-r equation:


Simplifying
7r + -5r + 12 = 7r + -1r

Reorder the terms:
12 + 7r + -5r = 7r + -1r

Combine like terms: 7r + -5r = 2r
12 + 2r = 7r + -1r

Combine like terms: 7r + -1r = 6r
12 + 2r = 6r

Solving
12 + 2r = 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.
12 + 2r + -6r = 6r + -6r

Combine like terms: 2r + -6r = -4r
12 + -4r = 6r + -6r

Combine like terms: 6r + -6r = 0
12 + -4r = 0

Add '-12' to each side of the equation.
12 + -12 + -4r = 0 + -12

Combine like terms: 12 + -12 = 0
0 + -4r = 0 + -12
-4r = 0 + -12

Combine like terms: 0 + -12 = -12
-4r = -12

Divide each side by '-4'.
r = 3

Simplifying
r = 3

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