3(2+7r)=-162

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Solution for 3(2+7r)=-162 equation: 


Simplifying
3(2 + 7r) = -162
(2 * 3 + 7r * 3) = -162
(6 + 21r) = -162

Solving
6 + 21r = -162

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 + 21r = -162 + -6

Combine like terms: 6 + -6 = 0
0 + 21r = -162 + -6
21r = -162 + -6

Combine like terms: -162 + -6 = -168
21r = -168

Divide each side by '21'.
r = -8

Simplifying
r = -8

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