-2(r-10)=12

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Solution for -2(r-10)=12 equation: 


Simplifying
-2(r + -10) = 12

Reorder the terms:
-2(-10 + r) = 12
(-10 * -2 + r * -2) = 12
(20 + -2r) = 12

Solving
20 + -2r = 12

Solving for variable 'r'.

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

Add '-20' to each side of the equation.
20 + -20 + -2r = 12 + -20

Combine like terms: 20 + -20 = 0
0 + -2r = 12 + -20
-2r = 12 + -20

Combine like terms: 12 + -20 = -8
-2r = -8

Divide each side by '-2'.
r = 4

Simplifying
r = 4

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