12-r=2r+36

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Solution for 12-r=2r+36 equation:


Simplifying
12 + -1r = 2r + 36

Reorder the terms:
12 + -1r = 36 + 2r

Solving
12 + -1r = 36 + 2r

Solving for variable 'r'.

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

Add '-2r' to each side of the equation.
12 + -1r + -2r = 36 + 2r + -2r

Combine like terms: -1r + -2r = -3r
12 + -3r = 36 + 2r + -2r

Combine like terms: 2r + -2r = 0
12 + -3r = 36 + 0
12 + -3r = 36

Add '-12' to each side of the equation.
12 + -12 + -3r = 36 + -12

Combine like terms: 12 + -12 = 0
0 + -3r = 36 + -12
-3r = 36 + -12

Combine like terms: 36 + -12 = 24
-3r = 24

Divide each side by '-3'.
r = -8

Simplifying
r = -8

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