-4(3+5r)=-31

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Solution for -4(3+5r)=-31 equation: 


Simplifying
-4(3 + 5r) = -31
(3 * -4 + 5r * -4) = -31
(-12 + -20r) = -31

Solving
-12 + -20r = -31

Solving for variable 'r'.

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

Add '12' to each side of the equation.
-12 + 12 + -20r = -31 + 12

Combine like terms: -12 + 12 = 0
0 + -20r = -31 + 12
-20r = -31 + 12

Combine like terms: -31 + 12 = -19
-20r = -19

Divide each side by '-20'.
r = 0.95

Simplifying
r = 0.95

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