-2(4-r)=4

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Solution for -2(4-r)=4 equation: 


Simplifying
-2(4 + -1r) = 4
(4 * -2 + -1r * -2) = 4
(-8 + 2r) = 4

Solving
-8 + 2r = 4

Solving for variable 'r'.

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

Add '8' to each side of the equation.
-8 + 8 + 2r = 4 + 8

Combine like terms: -8 + 8 = 0
0 + 2r = 4 + 8
2r = 4 + 8

Combine like terms: 4 + 8 = 12
2r = 12

Divide each side by '2'.
r = 6

Simplifying
r = 6

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