f-u=f+vx

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Solution for f-u=f+vx equation: 


Simplifying
f + -1u = f + vx

Add '-1f' to each side of the equation.
f + -1f + -1u = f + -1f + vx

Combine like terms: f + -1f = 0
0 + -1u = f + -1f + vx
-1u = f + -1f + vx

Combine like terms: f + -1f = 0
-1u = 0 + vx
-1u = vx

Solving
-1u = vx

Solving for variable 'u'.

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

Divide each side by '-1'.
u = -1vx

Simplifying
u = -1vx

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