-4(2+r)=20

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Solution for -4(2+r)=20 equation: 


Simplifying
-4(2 + r) = 20
(2 * -4 + r * -4) = 20
(-8 + -4r) = 20

Solving
-8 + -4r = 20

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 + -4r = 20 + 8

Combine like terms: -8 + 8 = 0
0 + -4r = 20 + 8
-4r = 20 + 8

Combine like terms: 20 + 8 = 28
-4r = 28

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

Simplifying
r = -7

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