-81=6v-13v

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Solution for -81=6v-13v equation:


Simplifying
-81 = 6v + -13v

Combine like terms: 6v + -13v = -7v
-81 = -7v

Solving
-81 = -7v

Solving for variable 'v'.

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

Add '7v' to each side of the equation.
-81 + 7v = -7v + 7v

Combine like terms: -7v + 7v = 0
-81 + 7v = 0

Add '81' to each side of the equation.
-81 + 81 + 7v = 0 + 81

Combine like terms: -81 + 81 = 0
0 + 7v = 0 + 81
7v = 0 + 81

Combine like terms: 0 + 81 = 81
7v = 81

Divide each side by '7'.
v = 11.57142857

Simplifying
v = 11.57142857

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