12r+9+4=10r-19

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Solution for 12r+9+4=10r-19 equation:


Simplifying
12r + 9 + 4 = 10r + -19

Reorder the terms:
9 + 4 + 12r = 10r + -19

Combine like terms: 9 + 4 = 13
13 + 12r = 10r + -19

Reorder the terms:
13 + 12r = -19 + 10r

Solving
13 + 12r = -19 + 10r

Solving for variable 'r'.

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

Add '-10r' to each side of the equation.
13 + 12r + -10r = -19 + 10r + -10r

Combine like terms: 12r + -10r = 2r
13 + 2r = -19 + 10r + -10r

Combine like terms: 10r + -10r = 0
13 + 2r = -19 + 0
13 + 2r = -19

Add '-13' to each side of the equation.
13 + -13 + 2r = -19 + -13

Combine like terms: 13 + -13 = 0
0 + 2r = -19 + -13
2r = -19 + -13

Combine like terms: -19 + -13 = -32
2r = -32

Divide each side by '2'.
r = -16

Simplifying
r = -16

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