43=55-u

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Solution for 43=55-u equation:


Simplifying
43 = 55 + -1u

Solving
43 = 55 + -1u

Solving for variable 'u'.

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

Add 'u' to each side of the equation.
43 + u = 55 + -1u + u

Combine like terms: -1u + u = 0
43 + u = 55 + 0
43 + u = 55

Add '-43' to each side of the equation.
43 + -43 + u = 55 + -43

Combine like terms: 43 + -43 = 0
0 + u = 55 + -43
u = 55 + -43

Combine like terms: 55 + -43 = 12
u = 12

Simplifying
u = 12

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