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Simplifying
5u2 + -90 = 9
Reorder the terms:
-90 + 5u2 = 9
Solving
-90 + 5u2 = 9
Solving for variable 'u'.
Move all terms containing u to the left, all other terms to the right.
Add '90' to each side of the equation.
-90 + 90 + 5u2 = 9 + 90
Combine like terms: -90 + 90 = 0
0 + 5u2 = 9 + 90
5u2 = 9 + 90
Combine like terms: 9 + 90 = 99
5u2 = 99
Divide each side by '5'.
u2 = 19.8
Simplifying
u2 = 19.8
Take the square root of each side:
u = {-4.449719092, 4.449719092}
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