12r-3=4r+9

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Solution for 12r-3=4r+9 equation:


Simplifying
12r + -3 = 4r + 9

Reorder the terms:
-3 + 12r = 4r + 9

Reorder the terms:
-3 + 12r = 9 + 4r

Solving
-3 + 12r = 9 + 4r

Solving for variable 'r'.

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

Add '-4r' to each side of the equation.
-3 + 12r + -4r = 9 + 4r + -4r

Combine like terms: 12r + -4r = 8r
-3 + 8r = 9 + 4r + -4r

Combine like terms: 4r + -4r = 0
-3 + 8r = 9 + 0
-3 + 8r = 9

Add '3' to each side of the equation.
-3 + 3 + 8r = 9 + 3

Combine like terms: -3 + 3 = 0
0 + 8r = 9 + 3
8r = 9 + 3

Combine like terms: 9 + 3 = 12
8r = 12

Divide each side by '8'.
r = 1.5

Simplifying
r = 1.5

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