2(r+18)+12=20

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Solution for 2(r+18)+12=20 equation: 


Simplifying
2(r + 18) + 12 = 20

Reorder the terms:
2(18 + r) + 12 = 20
(18 * 2 + r * 2) + 12 = 20
(36 + 2r) + 12 = 20

Reorder the terms:
36 + 12 + 2r = 20

Combine like terms: 36 + 12 = 48
48 + 2r = 20

Solving
48 + 2r = 20

Solving for variable 'r'.

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

Add '-48' to each side of the equation.
48 + -48 + 2r = 20 + -48

Combine like terms: 48 + -48 = 0
0 + 2r = 20 + -48
2r = 20 + -48

Combine like terms: 20 + -48 = -28
2r = -28

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

Simplifying
r = -14

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