-4(4+r)=12

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Solution for -4(4+r)=12 equation: 


Simplifying
-4(4 + r) = 12
(4 * -4 + r * -4) = 12
(-16 + -4r) = 12

Solving
-16 + -4r = 12

Solving for variable 'r'.

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

Add '16' to each side of the equation.
-16 + 16 + -4r = 12 + 16

Combine like terms: -16 + 16 = 0
0 + -4r = 12 + 16
-4r = 12 + 16

Combine like terms: 12 + 16 = 28
-4r = 28

Divide each side by '-4'.
r = -7

Simplifying
r = -7

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