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Simplifying
5v2 + -9 = 81
Reorder the terms:
-9 + 5v2 = 81
Solving
-9 + 5v2 = 81
Solving for variable 'v'.
Move all terms containing v to the left, all other terms to the right.
Add '9' to each side of the equation.
-9 + 9 + 5v2 = 81 + 9
Combine like terms: -9 + 9 = 0
0 + 5v2 = 81 + 9
5v2 = 81 + 9
Combine like terms: 81 + 9 = 90
5v2 = 90
Divide each side by '5'.
v2 = 18
Simplifying
v2 = 18
Take the square root of each side:
v = {-4.242640687, 4.242640687}
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