12r-9=6r+18

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Solution for 12r-9=6r+18 equation:


Simplifying
12r + -9 = 6r + 18

Reorder the terms:
-9 + 12r = 6r + 18

Reorder the terms:
-9 + 12r = 18 + 6r

Solving
-9 + 12r = 18 + 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.
-9 + 12r + -6r = 18 + 6r + -6r

Combine like terms: 12r + -6r = 6r
-9 + 6r = 18 + 6r + -6r

Combine like terms: 6r + -6r = 0
-9 + 6r = 18 + 0
-9 + 6r = 18

Add '9' to each side of the equation.
-9 + 9 + 6r = 18 + 9

Combine like terms: -9 + 9 = 0
0 + 6r = 18 + 9
6r = 18 + 9

Combine like terms: 18 + 9 = 27
6r = 27

Divide each side by '6'.
r = 4.5

Simplifying
r = 4.5

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