13=12r-5-3r

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Solution for 13=12r-5-3r equation:


Simplifying
13 = 12r + -5 + -3r

Reorder the terms:
13 = -5 + 12r + -3r

Combine like terms: 12r + -3r = 9r
13 = -5 + 9r

Solving
13 = -5 + 9r

Solving for variable 'r'.

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

Add '-9r' to each side of the equation.
13 + -9r = -5 + 9r + -9r

Combine like terms: 9r + -9r = 0
13 + -9r = -5 + 0
13 + -9r = -5

Add '-13' to each side of the equation.
13 + -13 + -9r = -5 + -13

Combine like terms: 13 + -13 = 0
0 + -9r = -5 + -13
-9r = -5 + -13

Combine like terms: -5 + -13 = -18
-9r = -18

Divide each side by '-9'.
r = 2

Simplifying
r = 2

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