12r+3=r-9

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


Simplifying
12r + 3 = r + -9

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

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

Solving
3 + 12r = -9 + r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
3 + 12r + -1r = -9 + r + -1r

Combine like terms: 12r + -1r = 11r
3 + 11r = -9 + r + -1r

Combine like terms: r + -1r = 0
3 + 11r = -9 + 0
3 + 11r = -9

Add '-3' to each side of the equation.
3 + -3 + 11r = -9 + -3

Combine like terms: 3 + -3 = 0
0 + 11r = -9 + -3
11r = -9 + -3

Combine like terms: -9 + -3 = -12
11r = -12

Divide each side by '11'.
r = -1.090909091

Simplifying
r = -1.090909091

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