-5(1+3r)=-15

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Solution for -5(1+3r)=-15 equation: 


Simplifying
-5(1 + 3r) = -15
(1 * -5 + 3r * -5) = -15
(-5 + -15r) = -15

Solving
-5 + -15r = -15

Solving for variable 'r'.

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

Add '5' to each side of the equation.
-5 + 5 + -15r = -15 + 5

Combine like terms: -5 + 5 = 0
0 + -15r = -15 + 5
-15r = -15 + 5

Combine like terms: -15 + 5 = -10
-15r = -10

Divide each side by '-15'.
r = 0.6666666667

Simplifying
r = 0.6666666667

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