u-12.4=8.6

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Solution for u-12.4=8.6 equation: 


Simplifying
u + -12.4 = 8.6

Reorder the terms:
-12.4 + u = 8.6

Solving
-12.4 + u = 8.6

Solving for variable 'u'.

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

Add '12.4' to each side of the equation.
-12.4 + 12.4 + u = 8.6 + 12.4

Combine like terms: -12.4 + 12.4 = 0.0
0.0 + u = 8.6 + 12.4
u = 8.6 + 12.4

Combine like terms: 8.6 + 12.4 = 21
u = 21

Simplifying
u = 21

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