72=-9U

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Solution for 72=-9U equation:


Simplifying
72 = -9U

Solving
72 = -9U

Solving for variable 'U'.

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

Add '9U' to each side of the equation.
72 + 9U = -9U + 9U

Combine like terms: -9U + 9U = 0
72 + 9U = 0

Add '-72' to each side of the equation.
72 + -72 + 9U = 0 + -72

Combine like terms: 72 + -72 = 0
0 + 9U = 0 + -72
9U = 0 + -72

Combine like terms: 0 + -72 = -72
9U = -72

Divide each side by '9'.
U = -8

Simplifying
U = -8

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