12-18=13r+18

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Solution for 12-18=13r+18 equation:


Simplifying
12 + -18 = 13r + 18

Combine like terms: 12 + -18 = -6
-6 = 13r + 18

Reorder the terms:
-6 = 18 + 13r

Solving
-6 = 18 + 13r

Solving for variable 'r'.

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

Add '-13r' to each side of the equation.
-6 + -13r = 18 + 13r + -13r

Combine like terms: 13r + -13r = 0
-6 + -13r = 18 + 0
-6 + -13r = 18

Add '6' to each side of the equation.
-6 + 6 + -13r = 18 + 6

Combine like terms: -6 + 6 = 0
0 + -13r = 18 + 6
-13r = 18 + 6

Combine like terms: 18 + 6 = 24
-13r = 24

Divide each side by '-13'.
r = -1.846153846

Simplifying
r = -1.846153846

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