-2(3+r)=6

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Solution for -2(3+r)=6 equation: 


Simplifying
-2(3 + r) = 6
(3 * -2 + r * -2) = 6
(-6 + -2r) = 6

Solving
-6 + -2r = 6

Solving for variable 'r'.

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

Add '6' to each side of the equation.
-6 + 6 + -2r = 6 + 6

Combine like terms: -6 + 6 = 0
0 + -2r = 6 + 6
-2r = 6 + 6

Combine like terms: 6 + 6 = 12
-2r = 12

Divide each side by '-2'.
r = -6

Simplifying
r = -6

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