-3(1+6r)=15

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Solution for -3(1+6r)=15 equation: 


Simplifying
-3(1 + 6r) = 15
(1 * -3 + 6r * -3) = 15
(-3 + -18r) = 15

Solving
-3 + -18r = 15

Solving for variable 'r'.

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

Add '3' to each side of the equation.
-3 + 3 + -18r = 15 + 3

Combine like terms: -3 + 3 = 0
0 + -18r = 15 + 3
-18r = 15 + 3

Combine like terms: 15 + 3 = 18
-18r = 18

Divide each side by '-18'.
r = -1

Simplifying
r = -1

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