-5(4r)=-80

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Solution for -5(4r)=-80 equation: 


Simplifying
-5(4r) = -80

Remove parenthesis around (4r)
-5 * 4r = -80

Multiply -5 * 4
-20r = -80

Solving
-20r = -80

Solving for variable 'r'.

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

Divide each side by '-20'.
r = 4

Simplifying
r = 4

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