-2(r+5)=0

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Solution for -2(r+5)=0 equation: 


Simplifying
-2(r + 5) = 0

Reorder the terms:
-2(5 + r) = 0
(5 * -2 + r * -2) = 0
(-10 + -2r) = 0

Solving
-10 + -2r = 0

Solving for variable 'r'.

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

Add '10' to each side of the equation.
-10 + 10 + -2r = 0 + 10

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

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

Divide each side by '-2'.
r = -5

Simplifying
r = -5

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