-13r+17r+-18r+12r+9=-19

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Solution for -13r+17r+-18r+12r+9=-19 equation:


Simplifying
-13r + 17r + -18r + 12r + 9 = -19

Reorder the terms:
9 + -13r + 17r + -18r + 12r = -19

Combine like terms: -13r + 17r = 4r
9 + 4r + -18r + 12r = -19

Combine like terms: 4r + -18r = -14r
9 + -14r + 12r = -19

Combine like terms: -14r + 12r = -2r
9 + -2r = -19

Solving
9 + -2r = -19

Solving for variable 'r'.

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

Add '-9' to each side of the equation.
9 + -9 + -2r = -19 + -9

Combine like terms: 9 + -9 = 0
0 + -2r = -19 + -9
-2r = -19 + -9

Combine like terms: -19 + -9 = -28
-2r = -28

Divide each side by '-2'.
r = 14

Simplifying
r = 14

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