-2(r+1)=18

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Solution for -2(r+1)=18 equation: 


Simplifying
-2(r + 1) = 18

Reorder the terms:
-2(1 + r) = 18
(1 * -2 + r * -2) = 18
(-2 + -2r) = 18

Solving
-2 + -2r = 18

Solving for variable 'r'.

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

Add '2' to each side of the equation.
-2 + 2 + -2r = 18 + 2

Combine like terms: -2 + 2 = 0
0 + -2r = 18 + 2
-2r = 18 + 2

Combine like terms: 18 + 2 = 20
-2r = 20

Divide each side by '-2'.
r = -10

Simplifying
r = -10

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