3(1+7x)=-81

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Solution for 3(1+7x)=-81 equation: 


Simplifying
3(1 + 7x) = -81
(1 * 3 + 7x * 3) = -81
(3 + 21x) = -81

Solving
3 + 21x = -81

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -3 + 21x = -81 + -3

Combine like terms: 3 + -3 = 0
0 + 21x = -81 + -3
21x = -81 + -3

Combine like terms: -81 + -3 = -84
21x = -84

Divide each side by '21'.
x = -4

Simplifying
x = -4

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