18-12r-4=-9r-16

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Solution for 18-12r-4=-9r-16 equation:


Simplifying
18 + -12r + -4 = -9r + -16

Reorder the terms:
18 + -4 + -12r = -9r + -16

Combine like terms: 18 + -4 = 14
14 + -12r = -9r + -16

Reorder the terms:
14 + -12r = -16 + -9r

Solving
14 + -12r = -16 + -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.
14 + -12r + 9r = -16 + -9r + 9r

Combine like terms: -12r + 9r = -3r
14 + -3r = -16 + -9r + 9r

Combine like terms: -9r + 9r = 0
14 + -3r = -16 + 0
14 + -3r = -16

Add '-14' to each side of the equation.
14 + -14 + -3r = -16 + -14

Combine like terms: 14 + -14 = 0
0 + -3r = -16 + -14
-3r = -16 + -14

Combine like terms: -16 + -14 = -30
-3r = -30

Divide each side by '-3'.
r = 10

Simplifying
r = 10

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