-3(3+5r)=13

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Solution for -3(3+5r)=13 equation: 


Simplifying
-3(3 + 5r) = 13
(3 * -3 + 5r * -3) = 13
(-9 + -15r) = 13

Solving
-9 + -15r = 13

Solving for variable 'r'.

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

Add '9' to each side of the equation.
-9 + 9 + -15r = 13 + 9

Combine like terms: -9 + 9 = 0
0 + -15r = 13 + 9
-15r = 13 + 9

Combine like terms: 13 + 9 = 22
-15r = 22

Divide each side by '-15'.
r = -1.466666667

Simplifying
r = -1.466666667

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