-7(1+8v)=-399

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Solution for -7(1+8v)=-399 equation: 


Simplifying
-7(1 + 8v) = -399
(1 * -7 + 8v * -7) = -399
(-7 + -56v) = -399

Solving
-7 + -56v = -399

Solving for variable 'v'.

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

Add '7' to each side of the equation.
-7 + 7 + -56v = -399 + 7

Combine like terms: -7 + 7 = 0
0 + -56v = -399 + 7
-56v = -399 + 7

Combine like terms: -399 + 7 = -392
-56v = -392

Divide each side by '-56'.
v = 7

Simplifying
v = 7

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